There isn’t consensus in the scientific community about whether Kubler-Ross’ five stages of grief is rooted in empiricism. Although much vaunted in popular culture, if you’ve experienced grief and resolved it in your own way, you’ll know that grief is an organic process that is by no means neat or orderly. It’s deeply unique to each individual, and this article is designed to hopefully help you through whatever loss you have experienced in the recent past.
The five stages of grief, which Kubler-Ross first postulated that terminally ill patients experience are: Denial, Anger, Bargaining, Depression and Acceptance. Denial in this context encapsulates a perfectly normal response to a tragedy, and is exactly what you would imagine – it’s simply a refusal to believe that “this bad thing is happening to me”. After reality sets in, and the sobering realisation that the tragedy has occurred is impossible to ignore, Kubler-Ross observed that people often display frustration, which culminates in Anger. Once that Anger has dissipated, people often move on to Bargaining, which is the hope that they can somehow extricate themselves from their dire straits and obtain the balm of a different circumstance. Notwithstanding the success of the earlier bargain, Depression follows, which is self-explanatory. The final stage of Acceptance is the sanguine realisation that nothing will change their situation.
If you are currently going through your own grief and taken a step back to evaluate how you are processing it, you might have noticed some incongruencies between the model and your experience. That’s perfectly natural because there has been some criticism levelled at the Kubler-Ross model in that there is confusion over description and prescription. This means you shouldn’t take it as a rule, no, or feel inadequate or “bad” that you aren’t “properly” grieving. We hope that what follows in this article will provide you with some breathing room to let your grief take its own course, and helps you handle a tragedy with the right tools.
Grief is a loss. It’s your prerogative to define what grief is to you, and even something as banal as losing a cherished item from your childhood can precipitate feelings of loss. So, you shouldn’t wall up these feelings behind what society has proscribed as appropriate. We’re talking about you here, not anyone else. It bears repeating that your grief is unique because of a multitude of factors, for those of you who don’t want to accept that it is your right to give yourself the breadth to grieve – your upbringing, your culture, your faith, your parents, the list is endless. So give pause and slip into your own rhythm of grieving.
To help ensure that you do not slip into the common fallacies that can disrupt your grieving process, we’re going to list some of the pitfalls that ensnare people and prevent therapeutic processing of grief.
1) If you don’t show an outward display of grief such as crying, you aren’t “sad”
Just like the shortcomings of Kubler-Ross’ model, while crying is seen as a “socially acceptable” way of demonstrating sadness, it isn’t applicable to everyone. You may have been brought up to avoid tears at all costs, perhaps due to tough parenting or some childhood trauma, or you may not wish to “affect” others with your grief. No matter the reason, you should know that physiological responses to grief vary widely depending on your circumstances. Shock, numbness, anger, even hysterical laughter – just about anything is permissible in the initial, very private stages of your grief.
2) If you don’t “get over it” within an “acceptable timeframe”, you aren’t good enough
Although your family members or people in your community may react to and resolve their grief earlier than you, you need to know that it is by no means healthy to affect the fragility of such a process by introducing the pressures of comparison. Some people simply have better coping-skills than others or are more inured to unhealthy thought processes that hold them back from the therapeutic management of their grief.
3) You feel like you need to “protect” loved ones from your grief, so you turn inwards
We keep emphasizing that grief is individual to everyone – this should tell you that there is no circumscription to how you handle it. Even though it might feel selfish to display your feelings openly because you think less emotionally able loved ones shouldn’t have to deal with your pain, remember that there is nothing shameful about the old adage, “Shared joy is double, shared sorrow is halved”.
There are some simple coping mechanisms that you can use to help yourself through the process. Although the low mood is a given after the heartache of a tragedy or loss, and you might not feel willing or able to pick yourself up and carry on, remind yourself of the wisdom of eating and sleeping right. Drugs and drink might seem the most accessible ways to insulate yourself from poor mood, but these indulgences, in the long run, are hindrances to sustaining your mental well-being.
If you feel like the person you have lost needs to be remembered, you can do so in the solitude of creative expression, or you can choose to gather loved ones to laugh about cherished memories. If there’s one scenario where laughter in the face of loss is wholly acceptable – here it is! Whether communal or solitary, there are many ways you can raise someone up in loving memory – honouring them and helping yourselves.
Find solace in your old routines. If you’re hurting after the failure to gain acceptance into a school of your choice, it may help to remember all the things you did well before that gave your life meaning and structure. At the worst of times, it helps to fall back on old patterns if only to hang on to some stability.
Lastly, know that there is a difference between clinical depression and the normal response to grief. You should be aware of critical signs or symptoms in both yourself and your loved ones that may indicate depression. For example, if you notice that your loved one isn’t eating or sleeping properly after a long period of time, or is displaying reckless tendencies such as driving dangerously or overindulgence in addictions, it may be time to seek professional help. Although many people can get through grief without the help of a mental health professional, when it all gets too heavy to handle, you may consider seeking grief therapy. Some of our clinicians are specifically trained in grief therapy, such as Joachim Lee or Winifred Ling.
Is there a reason why these virtual meetings are so exhausting? How is video calling different from face-to-face meetings in terms of mental load?
There have been many changes placed on us as a result of the government’s attempts to create social distancing between one another in response to the threat of COVID-19 in Singapore. For the employed, perhaps the most significant change involves having to work at home instead of working out of our regular workplaces away from home. Accordingly, the necessary attempts to communicate at work have now to be moved online since face-to-face meetings at work have been prevented. The result of having to conduct our regular conversations and discussions previously in the workplace to the online format means that facing the laptop to attend to vocational as well as social in one location becomes the common practice instead. There are certain characteristics of this practice which leaves users of video-conferencing fatigued:
(a) Previously at a regular meeting often at a conference site, the meetings carry a bigger social bearing. At a virtual meeting, this social bearing is reduced to what is visible only on a screen. Instead of the opportunity to scan the room previously which allows our eyes to adjust and therefore cope with eye strain, virtual meetings mean our gaze is now focused only on what is confined within this screen. We have to stare at this screen and then process everything we hear or see often over a protracted period within a certain frame. As a result, there can be visual overload and mental strain.
(b) Virtual meetings also require more effort than face-to-face meetings. We have to work harder to process non-verbal cues such as facial expressions, the tone and pitch of the voice, and body language. In contrast to face-to-face encounters, virtual meetings require more effort to assess social and personal meaning because of the context. According to Dr Gianpiero Petriglieri, an associate professor of Organizational Behavior at INSEAD, there is a dissonance that emerges during virtual meetings because during this interaction between participants in this format, “our minds are together when our bodies feel we’re not.” This dissonance or disconnection causes people to have conflicting feelings which add to the fatigue. This makes it difficult for people to relax into the conversation naturally.
(c) Dr Marissa Shuffler, an associate professor of industrial/organizational psychology also describes the fatigue that can come from being watched because the camera is physically and constantly focused on us. In natural social settings, this does not happen. During virtual meetings, people can feel they are on stage and therefore, they feel the social pressure and are expected to perform. The larger the group, the stronger the pressure.
(d) There is also the stress that comes from delays on phone or conferencing systems or when the screen freezes. Glitches in the application of technology put pressure for the participants to ensure that relevant or significant information is not missed out, or to avoid misunderstanding information from what has been communicated. This becomes harder to slow down to clarify when there is a group meeting out of concern that questions could be seen as interference within a tenuous electronic connection.
(e) Visual overload and fatigue that comes from constant online viewing occur not only if meetings are long or frequent with its inherent stresses. The restriction to home has also placed reliance on engaging other activities online, eg. taking classes, ordering food, maintaining social connections outside the immediate family. If there is a practice of over-reliance on the computer screen to attend to other interests, the physical effort to position ourselves at a prolonged period in front of this screen can also create fatigue.
(f) The strain that comes from virtual meetings can be accumulative when meetings are arranged close to one another. Since the worker is already confined at home, virtual meetings can easily be scheduled one after another. The meetings can appear to be executed efficiently. But there may not be any mental breaks in between.
(g) Dr Petriglieri also noted that meeting online creates stress from being reminded that the familiar context has been disrupted by the pandemic. We are all coping within a crisis that has taken the lives of the elderly and the vulnerable in society and endangers our well-being. It is also stressful in the fact that we are used to separating different relationships such as family, friends or colleagues. But now they are all happening within the same space. The self-complexity theory posits that individuals have multiple aspects about themselves –context-dependent social roles, relationships, activities and goals–and we find this healthy. When we find this variety reduced, we become disoriented and become more vulnerable to negative feelings. Over a prolonged period of the self-quarantine, he notes the effect: “We are confined in our own space, in the context of a very anxiety-provoking crisis, and our only space for interaction is a computer window.”
How do you alleviate the exhaustion that comes with virtual meetings? Are you able to share a few tips or suggestions?
In light of the stresses and strains of increased virtual meetings as outlined, I would suggest the following:
(a) limit the video calls to only what is necessary; this implies that it is important to take breaks from electronic devices, in general, to avoid over-reliance on them and the subsequent emotional effects from excessive use,
(b) allow for the option to turn off cameras on yourself to be involved and/or face the screen off to one side so that you can concentrate without feeling the pressure to be on camera,
(c) plan breaks in between virtual meetings so that the body and mind have a chance for a break, eg. getting the body to move and stretch increases blood flow and reduce mental fatigue,
(d) if virtual meetings are unavoidable and long, learn to practice the 20-20-20 rule: every 20 minutes, takes 20 seconds to look at something 20 feet away. Remember that the electronic devices are our tools and not our master.
What can bosses or organizers of these meetings do to facilitate these meetings so people don’t leave the meetings feeling exhausted? (While taking into consideration, the time spent on these meetings, or the feelings of the attendees)
It may help to start the meeting by quickly checking in to each other’s well-being. Being ready to acknowledge that the virtual meetings are unusual and that working at home means having to accommodate other family members inconvenienced by the pandemic invites everyone to be mindful about coping collectively with the current disruption. Secondly, consider if virtual meetings are the best way to work. To prevent information overload, would sharing files be more effective? Or the use of the phone to communicate may be a better device in many cases if there is only simple information to share. Thirdly, it may help if the meeting agenda is clearly defined and the end of the meeting is outlined at the start to reduce mental fatigue. Can the meetings be brief knowing that other meetings may be required? If meetings are prolonged, plan for breaks.
What can attendees/employees do to reduce the number of hours spent on video calls? (for example, what they can say to their bosses, or to keep track of the time so everyone is on track)
There needs to be increased education all around related to this topic of fatigue that comes from increased video-conferencing. It is a condition exacerbated by changes at work because of the pandemic. Employees should know their limits. If they recognize when fatigue sets in from excessive computer use, they should limit themselves from relying on their electronic gadgets throughout the day. Research has already shown that excessive computer use is correlated with depression. With more apps available online, there is an increased potential to become more dependent on electronic devices already. During this pandemic, the pressure to depend on the computer through increased virtual meetings is intensified. It is times like this when the wise among us would learn to separate the benefits of computer use from its downsides.
In light of this knowledge, employees can be more proactive to define the perimeters in which they would like to have virtual meetings conducted. If they recognize when fatigue will set in because of prolonged virtual meetings, they can ask to clarify (or specify) to their managers how long the meetings will take to monitor their mental and physical strain. In cases when prolonged virtual meetings are unavoidable, they can clarify if permission can be given to practice adjustments such as moving around as a way of coping with eye strain or from limited mobility experienced during the meetings, avoid the direct exposure to the camera, mute the calls to focus on listening or take breaks after every hour. At times, a person may have to prepare for any interference from young children who find it hard to ignore the presence of the parent at home.
How do we instil positivity in our working lives, when the line between work and home is so blurred right now?
The pandemic and the subsequent quarantine is experienced as a period of adversity to some people. The emotional distress that comes from being quarantined has been recognized as common during this period. Common symptoms of this distress include fear, sadness, numbness, insomnia, confusion, anger, stress, irritability, post-traumatic stress symptoms, depressive symptoms, low mood, emotional exhaustion and emotional disturbance (eg. paranoia, anxiety). More specifically, people are faced with the disruption to the routines they have set up to cope with their stressors before the imposition of the quarantine. Distress is experienced because of the effect of the disruption on their autonomy, their sense of competence (being in charge of their lives to cope with their lives), their connectedness and their sense of security. It is a test on our resilience and ability to cope.
At the same time, the very challenge of this situation also provides us with the opportunity to develop our resilience. The first step is to understand and remember that these circumstances are temporary and not permanent. Pandemics happen but they are not frequent in history. Secondly, realize that there is a way to cope with the circumstances. As such, coping with this current situation is priority. I would suggest the following:
(a) Establish a routine for yourself (and that of your children). By creating a structure to attend to work and recreation, you start to organize and occupy yourself with addressing your daily needs as well as that of your family.
(b) Be as active as possible to maintain a fitness level physically, mentally and relationally for yourself and with your family. This also helps to battle against boredom. There are exercise videos online which you and your children can participate together to exercise as well as bond together. Also, for a personal project, you can ask yourself, “What will it take for me to become physically and mentally and relationally stronger as a result of this crisis?” Be curious about how to grow your resilience and to nurture the best version of yourself. Or as a parent, create a project to help your child develop resilience in their own lives and ask, “How can I help my children become physically, mentally or relationally stronger as a result of this crisis?”
(c) Deal with boredom by creating projects that self-nurture, eg. start a hobby or clean out your closet. Competing personal tasks provide a sense of purpose and maintain a sense of competency despite the external circumstances. Creating plans daily offer a focus on accomplishing what is important to your well-being.
(d) Communicate more to avoid isolation as well as cope with boredom. This can be an opportunity to nurture relationships if you are in quarantine with family and to strengthen social bonds with them, or with your support group. Remember that kids may be stressed too from this experience. More time together can provide opportunities for increased play to increase bonding. Games are useful means to bring fun into your relationships and to develop socially besides your entertainment. It can also become a reminder that the family is safe and coping together.
(e) Be informed without being overwhelmed to cope with the anxiety that comes from the unknown. The Straits Times newspaper provide a useful daily update so that you can monitor the threat of the virus rather than obtaining information from cable news. There is much information on the virus today locally and globally so be careful not to become obsessed with the topic.
(f) If you find that your distress is becoming more intense, consider support for your mental health. Your mental health is very important for your daily and long-term functioning. Different places may offer telehealth support where you can consult a therapist or mental health professional. Some services are available online and they can be reached through email, phone calls, texts or video calls.
As the COVID-19 confinement continues, you may have a nagging question on your mind – “what have I managed to achieve”?
Tidy, clean desk draws, closets, and glove compartments; a surprising proficiency in a new language; the final 100 pages of War and Peace; an impressive yoga position; a dazzling new magic trick?
Several weeks into the confinement in Singapore and with several weeks to go before we can be physically social with our friends, some of us may be deflated.
When the confinement/circuit breaker started, we may have vowed to use all the new free time to do things we have never got around to doing.
Now that time is gradually slipping by – we may think that we still haven’t accomplished our goals.
As a psychotherapist, I listen to many people starting to stress that this opportunity of more time isn’t panning out the way they imagined – and that critical voice in their heads is telling them they are inadequate and unworthy.
Feeling Stuck in Shame
What I hear is the frustration of “stuckness.”
Clients tell me: –
I must be more productive
I should have achieved more since confinement began
I should be able to concentrate more and procrastinate less
I must have more enthusiasm, motivation and energy
Note the use of the words “should” and “must”. Our inner critic loves to remind us of all the things we should have done or must do.
It is important to be compassionate to ourselves and banish these words from our vocabulary – at least for the time being.
We may have overestimated what we could achieve in confinement; and underestimated the power of the inner critic, worry and low mood. These are preventing us from feeling satisfied with what is.
Perhaps we had the fond notion that confinement would be like a holiday – more rest, more family time, novel and interesting things to do, and relief from work and the other routines in life.
Reality may now be striking home. Anxiety about our jobs, income, and savings; fear about us and our loved ones contracting the virus; worry that food, masks, and other resources may be scarce; boredom at a routine in the cramped confines of home; the resurrection or development of old family dynamics, fraught with irritations, frustrations, disappointment, mistrust and anger. For some, isolation and loneliness may be an even more crushing weight.
Reframing our Expectations
What will help is kindness – and, in particular, kindness to ourselves.
Perhaps some of us are high achievers, driven by: concrete stretch goals, targets and objectives; KPIs; reports; numbers; test or exam scores.
But COVID-19 confinement is not the time to measure yourself in this way. It’s like drinking soup with chopsticks – frustrating.
I recommend that we redefine productivity and measure our day by whether:
we have achieved an emotional connection with ourselves and others,
got some exercise,
meditated for a few minutes,
did some yoga or Tai Chi,
read something (other than COVID-19 news or social media content);
did something creative, like photography, videos, painting, made some music, baked something new; and
spent “me time” – just sitting quietly, relaxing and enjoying being in the moment.
This confinement is not a competition – so we do not need to compare ourselves against others.
We must permit ourselves some numbing out to Netflix and videos – and not beat ourselves up if we eat some chocolate, cookies or chips.
Let’s also be realistic and recognise that our routines will be different – and that we won’t accomplish the same things in confinement. We will have accomplished things – but they just won’t be the usual things.
Manage your expectations, be gentle with yourself and kind to others – and you will find that there is meaning and purpose to your confinement.
Being in the rat race can be exhausting, especially when we feel the need to constantly measure up. With the majority of us being brought up in a competitive culture, we tend to compare and be compared against others in terms of our achievements and levels of success. In some way or another, there is also a certain mindset that we should feel a certain level of shame or guilt if we are not as high performing (i.e. productive) as we should be. However, we failed to recognise that our productivity is not all there is to determine our self-worth. We cannot measure our own self- worth or self-value based on what we can or have achieved. Our unique qualities, as well as our intrinsic values, are all factors that contribute to what makes us truly ourselves. We need to focus less on external yardsticks and appreciate our inner qualities. Falling into the misguided notion of equating our state of busyness or productivity to our self-worth will lead to unnecessary stress and other health-related issues – both mentally and physically.
People who tend to beat themselves up for the various things that they were unable to complete rather than acknowledging what they have actually accomplished will experience low levels of self-worth. In fact, for these individuals, the amount of praise they give themselves is much lower than the amount of self-blame when they fail to get things done. Surely, a common measurement of productivity is the number of materialistic accomplishments. But it is also a common misunderstanding that busyness is a reflection of productivity. The misconception is that when a person is ‘too free’, he is being unproductive.
Productivity, unlike what most would expect, isn’t about getting as much done as you can and checking off every task on your to-do list. Productivity isn’t just about producing more. Instead, it is about focusing and spending time on the right things. There is a difference between spending your precious time and energy on a multitude of tasks that aren’t nearly as important, as compared to accomplishing a few things that matter the most to you. Our point is – try doing some soul-searching, and understand what you truly value or what are the things that define you. This will help you to refocus your time and energy on what you actually want to accomplish at work and in your personal time. If you treasure familial relationships more than work, then allocating more time towards family bonding will seemingly be more productive, and time well-spent. Redirecting your energy towards what you value most is what ultimately contributes to your self-worth as by doing so, we focus more on our intrinsic self.
We need to recognise that self-worth is the opinion we have about ourselves and the value we placed on ourselves. Under most circumstances, we can safely say that our productivity is not equivalent to our self-worth. Firstly, it is of utmost importance that we stop comparing ourselves to others. Although easier said than done, we need to come to terms with the fact that people are bound to walk down different paths. What is important to them may not matter even the slightest bit to you. Similarly, what they have achieved shouldn’t automatically become your personal goal just to match up to them. The more we compare ourselves to others’ achievements, the less satisfied we will be with ourselves and the lower our self-esteem becomes. Needless to say, this becomes totally self-defeating.
Perhaps you’ve heard of the common saying that we should always “focus on the process, not the outcome, and you will enjoy great success”? In light of this, the only being we should be comparing ourselves to is our past self. Are you doing better than before? Are you allocating time for self-improvement and self-appreciation?
This leads us to our next point – we need to cut down on excessive self-criticism and self-blame. Instead, embrace and accept our flaws. As humans, we are all inherently flawed. However, no one should have to believe that he or she is less worthy, inadequate or inferior due to his or her flaws. Viewing your weaknesses from such an angle will only cause your self-confidence to plummet. Instead, think about how you can change your bad habits, if these were your flaws for example, and improve on yourself. Getting yourself on the road to becoming a better version of yourself will prove to be more effective in raising your self-worth than by using productivity or the number of tasks you got done as a mode of measurement.
As mentioned, we all have our own unique qualities that distinguish us from others. It is important that we recognise and appreciate them, for they make us one of a kind. If you ever feel down in the dumps, with feelings of worthlessness or inadequacy, it helps to remind yourself that you are more than that. Grab a piece of paper and list down your positive traits and things that you appreciate about yourself. Doing some inner-search and writing down words of affirmation can definitely lift your spirits and help you regain your self-esteem.
With that being said, some may still find it tough to detach themselves from counting on productivity-based self-worth. After all, it may have become a habit, having been brought up with such a mindset. However, we need to note that this becomes a problem if it causes us to succumb to unhealthy levels of stress and anxiety, especially if we overload ourselves with too much work and aspirations in an attempt to boost our self-worth. If you find yourself overwhelmed and unable to cope, we hope you’ll seek help from professionals for the sake of your mental wellbeing in the long run. Do reach out to us whenever deemed necessary.
At its most elemental level, people avoid the risk of failure for one simple reason – it hurts. Every single person has experienced failure. If you were to interpret failure by its definition in the dictionary, “the neglect or omission of expected or required action”, wouldn’t you, as a child, have stumbled along the way to achieving those long strident steps you take when strutting along the sidewalk? Yet, nobody feels ashamed of failing to learn to walk as a toddler. Why’s that? You could say that no-one in the right mind would expect that of a human child – we aren’t deer, or gazelles that need to shake off the afterbirth and walk – or risk predation. Our success as a species which put us at the top of the food chain negates that need. Fear is a function of the amygdala, yet failure isn’t. There’s a distinction here that we need to be mindful of. If you’re a parent or have access to YouTube, you’ve probably noticed that there’s an innocence in children that can be quite uplifting to watch, as they try multiple times to succeed at a simple task. They don’t puff their cheeks out and sigh in despair, or bury their heads in their hands. At most, they demonstrate frustration.
Shame is learned behaviour that children integrate into their developing moralities, either from being taught or through observation. Studies done on athletes have shown that perceived parental pressure (or pressure from authority figures) have deleterious effects on how sportspeople experience and interpret failure. Simply put, the fear of failure is a construct of how societies function. For some people, the avoidance of shame that failure brings weighs too heavily on them, and that is the crippling fear of failure. Dr Guy Finch puts this rather more succinctly: “fear of failure is essentially a fear of shame”. How then, do we begin to become more self-aware in the face of these deeply ingrained avoidance mechanisms to start building our best selves?
After all, overcoming fear of failure is all about reversing negative thought patterns, and Cognitive Behavioural Therapy (CBT) is designed to help you identify the underlying belief that causes a negative automatic thought (which in turn guides the feelings that come with it).
With the help of a qualified mental health professional, which can be anyone from a trained psychologist, psychotherapist or even psychiatrist, you can be empowered to break the circuit of the pervasive vicious cycle of negativity that prevents the unfettering of fear of failure’s heavy chains.
For instance, think of each deeply held criticism that you can’t let go of as a block in a Jenga game with your friends and the tower represents your thought life as a whole. Even though you’ve suffered through failure after failure, you can’t seem to jettison them from your psyche. Can you imagine a game of Jenga that doesn’t end in peals of laughter? It seems that some re-evaluation is needed to turn the way you handle each soul-sucking gut-punching failure from the darkness of your room. The grip of negativity steadying your trembling hand, an extension of your mind, putting each block up on autopilot because you believe you are not good enough. Instead, we suggest turning the lights on, invite someone you trust into your sanctum of despair, to play the game of Jenga with you. As you ease into their presence, you’ll begin to notice that the tower doesn’t look so intimidating anymore. It’s no longer just a congealed mess of all your shortcomings and toxic thinking, but a simpler thing that can be deconstructed. If each block represents a negative conviction you have about yourself that is too painful to touch, reach for the piece that looks more well-shorn and polished (which represents a perceived positive character trait or accomplishment that you hold dear). Put it back on top of your tower. It is yours, isn’t it? Or perhaps let your confidant handle that splintery block.
Of course, we all know that Jenga isn’t all laughter and grand gestures. There’s physical tension and the cogitation of making the right choice so the tower doesn’t crumble prematurely. Maybe you aren’t too good at Jenga. That’s fine. But if you start thinking of this special game of Jenga as a collaborative effort instead of a competitive one, you’ll start getting the picture. Who would you like to invite to collaboratively play a game of Jenga?
Sagar, S and Stoeber, J. Perfectionism, Fear of Failure, and Affective Responses to Success and Failure: The Central Role of Fear of Experiencing Shame and Embarrassment. Journal of Sport and Exercise Psychology, 2009, 31, pp 602-627.