Archive for November, 2008
Addiction and Incentive Saliance
Nov 10th
Readers of this blog will be aware that I support and am sympathetic more towards the incentive-saliance theory of dopamine rather than the reward-prediction theory of dopamine. The incentive salience theory of dopamine has been elaborated on by Berride and Robinson and I have touched upon that previously in my posts.
It was heartening to note that Daniel Lende, a co-author of one of the blogs I admire, Neuroanthropology, has research interests in the same incentive salience paradigm and had been doing an anthropological study of Colombian teens with regards to addiction and how the drug-users themselves describe their condition from the inside. He has been featured in a recent Scientific American interview and I would recommend reading the article in its entirety. He also has a three part series on his blog on the same topic.
Amongst other things, he notes that there are three parts to addiction (and dopamine’s role in addiction):
First was the emphasis that researchers placed on “wanting.” I was lucky in Colombia; addicted adolescents often described their experiences as “querer más y más,” to want more and more. Second, dopamine affects shifts in attention, which meant that some adolescents couldn’t focus on anything else when they knew an opportunity to consume was about to come along. Third, adolescents described a sense of being pushed toward something—an urge that rose up without conscious desire.
In other words the possible role for dopamine in addiction may be related to 1) conscious wanting 2) shifts in attention 3) un/subconscious urge or compulsive craving. Of course he also mentions the importance of cultural symbols and how they affect drug use.
He has also developed an eight-point scale for assessing addictive urges (craving and compulsive involvement scales) and the scale is available in both English and Spanish. Hope it spurs more research and is widely used.
A must read for those of us, who are too focussed on dopamine and the disease mode, when it comes to addiction.
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Encepahlon #58 now Out: Decide to read it now!!
Nov 10th
The 58th edition of Encephalon, is now available at the Highlight Health blog. This decision making edition that implores you to take stock of your needs, preferences, values and emotions to arrive at a decision to read and appreciate the best in last fortnight’s brain blogging, is very ably hosted and presented by Walter.
The articles I liked in particular were a comprehensive review of gender differences in aging by Chris at Ouroboros; an article on whether, to what extent and at what age do fetuses start feeling/ experiencing pain by Paul at the Combining Cognits blog; a review of gender differences in depression and its treatment by Dr Shcok; and various other interesting articles like the five-clover luck theory by David at ScienceBase or the bullies get kick out of seeing pain of others deconstruction by the the Neurocritic. There is more available including reports on psychopathy, multi-tasking, addiction etc, so rush on to the original Encephalon edition for more stimulating posts.
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Goals of Psychology and major persoanlity theory groupings
Nov 7th
I recently came across the All Psych website which I found to be a very good resource for anyone interested in Psychology. I was reading the Personality synopsis section and was struck by the goals of psychology delineated there :
Psychology is the study of thoughts, emotions, and behavior, and their interaction with each other and the world. There are five basic goals of psychology:
1. Describe – The first goal is to observe behavior and describe, often in minute detail, what was observed as objectively as possible
2. Explain – While descriptions come from observable data, psychologists must go beyond what is obvious and explain their observations. In other words, why did the subject do what he or she did?
3. Predict – Once we know what happens, and why it happens, we can begin to speculate what will happen in the future. There’s an old saying, which very often holds true: “the best predictor of future behavior is past behavior.”
4. Control – Once we know what happens, why it happens and what is likely to happen in the future, we can excerpt control over it. In other words, if we know you choose abusive partners because your father was abusive, we can assume you will choose another abusive partner, and can therefore intervene to change this negative behavior.
5. Improve – Not only do psychologists attempt to control behavior, they want to do so in a positive manner, they want to improve a person’s life, not make it worse. This is not always the case, but it should always be the intention.
To me the five major goals of psychology follow the five general stages that I usually talk about: The first stage in my analysis of disparate phenomenons begins with it being descriptive and focused on clearly delineating the phenomenon under study and is generally biological. The second stage usually tries to find the impulses or reasons behind the phenomenon and is more related to explaining causes for the phenomenon and is generally related to motivation. The third stage is usually concerned with development of phenomenon such that we can get some basic predictive properties in the mundane real world and is generally related to outward behavior. The fourth stage is usually focussed on how the phenomenon can be kept in check and is generally related to social dimensions (conformity and peer pressures). The fifth stage is usually related to how the phenomenon sort of gets a unique personal flavor and is generally related to individualistic and individuation dimensions.
Now, as an example I will try to make a case that though all the major theoretical approaches in personality psychology make use of all the stages and have as their goal all the five goals as delineated above; some of them are more focussed on one particular goal/ stage and thus are characterized by that goal/ stage.
Let me briefly review the major theoretical approaches to personality psychology below in the light of this framework:
- Trait / Biological approaches to personality: I believe it is fair to group the biological and trait theories under the same group as the major feature of these theories is to outline the number of factors that can be used to describe a personality adequately. They are primarily descriptive in nature. One can argue that biological theories also explain the traits in terms of underlying biological markers; but that is juts begging the question one level down. Why does neurotransmitter system A over activation lead to this observable trait? They just describe the higher trait in terms of a lower biological phenomenon and are very good at descriptive level; but they lack explanatory powers.
- Psycho dynamic/ Psychoanalytical theories: These theories, the most famous being that of Freud, try to explain the personality and are totally obsessed in trying to find reasons for all and sundry observable phenomenon including accidental slips of tongues. these are very good at explanatory levels, but not very good at other levels like predicting personality from childhood experiences or even in adequately describing the personality structure. They are more focussed on dynamics and less on structure.
- Behavioristic/ behavior genetics theories: These theories , the most famous being Skinnerian theories are most concerned with predicting behavior based on past experiences/ learning. These are the S-R or CS-CR theories and operant theories; the primary motivation not being to either describe or to explain personality; but just to predict how a behavior can be predicted given a personality (previous behavioristic learning). Thus the primary focus on the ability to predict phenomenon and applications too limited to situations and traits that can lead to predictability.
- Social learning/ Cognitive theories: These theories like that of Bandura, Beck etc are more concerned with how personality can be ingrained or learned and controlled. Both Bandura’s bobo doll experiments as well as CBT point to the direction and focus of these approaches: what are the right conditions of personality formation and how that process can be controlled either by providing right role models/ environments conducive to social learning or by changing our cognitive schema. The action has moved away from describing or explaining or predicting to controlling how a good and socially acceptable personality can be formed/ learned.
- Existential – Phenomenological theories: These theories, like that of Maslow, are more concerned with how to improve one’s personality. The focus is on flows, self-actualization, self-transcendence or whatever. One has moved away from mere description, analysis, prediction or control to actually thinking about what is a good personality and how to attain it; hence the primary focus on finding meaning; finding full potential and on improvement and positive psychology
The Mouse Trap is in the WIKIO 100 Top Science Blogs!!
Nov 3rd
I would like to thank all the readres of this blog, especially those who have linked to my posts or commented here; as a result of their patronage the humble Mouse Trap blog has made it to the top 100 Science blogs list maintained by none other than Wikio. It is a great honor to share the same space as that of BPS research digest, Cognitive Daily, Sharp Brains, Mixing Memory and Developing Intelligence, to name a few of my admired blogs. I note that my ranking is 93 and prone to slip from the top 100 list next time; that doesnt bother me- this recognition, even if not sustained, but for one time only, acts as a booster to motivate and spur towards more and more quality blogging.
Thanks again to all the readers.
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