Posts tagged evolution
PAD is a popular dimensional theory of emotions, whereby all emotions can be classified on three dimensions: Pleasure (Pleasant- Unpleasant), Arousal (Ready-Relaxed), and Dominance (Control- Lack of control). To this model has been added a fourth dimension called Predictability (Ambiguous- Certain) (please see my earlier post for why this fourth dimension is relevant).
As an example, anger and fear are both unpleasant emotions, but angry person is in control (has high dominance) while a fearful person is not in control of the situation.
Similarly, both contentment and excitement are pleasant emotions, but the former is low arousal and the latter high arousal.
Thus, emotions differ on four basic dimensions. I’ll address each of these dimensions below:
Pleasure (pleasant – unpleasant). This is similar to pleasure-pain polarity as highlighted by Millon and works at the Affective level in the ABCD model. The pleasure polarity addresses the physiological needs (Maslow’s hierarchy, see here) for maintaining body, while the pain polarity ensures that we stay out of harm’s way and take care of our safety needs. If one were to measure well-being related to this dimension, the appropriate measure would be something like PANAS, a difference between your positive affect and negative affect. In a nutshell, this is characterized by in-the-moment feelings and if your needs are met here, you live a happy life in the hedonic sense. The existential challenge would be body-givennenss and what to do given the body- a potential answer being – survive and protect body integrity.
This dimension, related to feelings, may have evolved to help our bodies/genes survive. If something leads to unpleasant emotions, avoid it; if it leads to pleasant emotions, indulge and approach!
Arousal (Ready-Relaxed): This is similar to the active-passive polarity as highlighted by Millon and works at the Behavioral level of ABCD model. The active polarity, which is related to being excited/ inspired, addresses the self-actualization needs of Maslow’s, while the passive polarity, which may be related to tranquility/ calmness/ meditation etc is related to transcendence needs. If one were to measure well-being related to this dimension, the appropriate measure would be something like Ryff’s Psychological well-being measuring things like psychological growth etc. This dimension may be related to living authentically in this world and experiencing life to the fullest. The existential challenge relevant here would be how to cope with a meaningless/ absurd world. The answer may lie in living life fully and experiencing it deeply.
This emphasis on experience is related to the ‘experience’ component of consciousness (recall that consciousness is made up of two parts- experience and agency). This dimension of emotion, related to energy/ experience, may have evolved to give the emotion a vibrant and vivid tone. That vibrancy may be required if after gaining a mind, we can retain it i.e. remain sane.
Predictability (Ambiguous- Certain): This is similar to the broad-narrow polarity as highlighted by Millon, and works at the cognitive level of ABCD model. The broad polarity, which is ambiguous and amorphous, is related to the Aesthetic and beauty needs of Maslow, while the narrow polarity to Knowledge and understanding needs. If one were to measure well-being related to this perhaps Satisfaction with Life survey might work. This dimension is related to attracting mates (both beauty and brains are attractive) and perhaps reproduction. The existential challenge here may be Death and the answer may be transcending death by leaving progeny. Cognitive abilities allow one to reflect on one’s own death and this leads to obsession with procreation. Intelligence (and beauty) associated with this dimension may be a result of sexual selection.
This dimension, associated with intelligence, may have evolved to help out bodies/ genes replicate. To figure if a mate is the best possible mate, and to attract / coax it, one may need intelligence and beauty.
Dominance (Control/ Lack of control): This is similar to self-other polarity, related to Drive level of ABCD. The Self polarity is associated with self-esteem needs while the Other polarity with Belonging needs. Another way to conceptualize the same polarity is on interpersonal dimension of competence and warmth. If one were to measure well-being related to this dimension, the appropriate measure would be something like Key’s Scoial well-being measuring things like social trust. This dimension is related to controlling/ influencing others either via power or via love. The existential given here is Isolation and the solution is domination and control through exercising one’s ego. Agency/ ego/self may be important here. the issue whether we have control or nor makes this a part of moral domain too.
This dimension, associated with ego, may have evolved to spread the memes associated with the ego far and wide.
In essence, while Feelings and Intelligence are more closely related to evolution (survival and reproduction) of our physical bodies, Agency and Experience are more closely related to the evolution of our minds.
Altruism, put simply, is helping others or cooperating with others, even if it is costly to self. Of course, something like that cannot evolve, unless there are benefits too, associated with such acts of apparent selflessness.
Cooperation, to start with, can evolve based on three forms of reciprocity: direct, indirect and network. All are based on the fact that there re repeated interactions between group of people- dyads, triads or many more. Reciprocity can typically be measured in the lab using the repeated Dictator/ Trust game.
Direct reciprocity was proposed by Robert Trivers as a mechanism for the evolution of cooperation. If there are repeated encounters between the same two players in an evolutionary game in which each of them can choose either to “cooperate” or “defect”, then a strategy of mutual cooperation may be favoured even if it pays each player, in the short term, to defect when the other cooperates.
Here, in direct reciprocity A trusts/helps B and hopes that when time comes B will reciprocate/help A. The top-of-the-mind factor is whether or not to trust somebody and whether or not to reciprocate someone’s trust. Trust and exploitation may be relevant issues here. In the Dictator/ Trust game this trust/exploitation manifests as the amount that is split and given to the other person vs kept with oneself.
In the standard framework of indirect reciprocity, there are randomly chosen pairwise encounters between members of a population; the same two individuals need not meet again. One individual acts as donor, the other as recipient. The donor can decide whether or not to cooperate. The interaction is observed by a subset of the population who might inform others. Reputation allows evolution of cooperation by indirect reciprocity.
This is partially correct that reputation for being trustworthy helps in indirect reciprocity; however that is only true for the downstream version; for the upstream version feelings of gratitude/happiness/awe/elevation in persons receiving the help/ witnessing the act also lead to more pro-social behavior by those receiving help/ witnessing. Thus feelings of gratitude/ awe/elevation mediate this kind of upstream indirect reciprocity. See below for upstream and downstream variants.
Individual acts of indirect reciprocity may be classified as “upstream” or “downstream”:
Upstream reciprocity occurs when an act of altruism causes the recipient to perform a later act of altruism in the benefit of a third party. In other words: A helps B, which then motivates B to help C.
Downstream reciprocity occurs when the performer of an act of altruism is more likely to be the recipient of a later act of altruism. In other words: A helps B, making it more likely that C will later help A.
Before touching upon network reciprocity, I will take a quick detour about kin selection. I believe kin selection or inclusive fitness is also a type of reciprocity (that between related individuals sharing genes) and may be rechristened genetic reciprocity. After all if A is likely to help B because they share x % of genes, the reverse is equally true and applicable. And of course this is mediated by emotional attachment to the kid/kin.
As per one definition of kin selection:
A biological theory stating that a gene that causes an organism to exhibit behavior detrimental to its survival will increase in frequency in a population if that behavior benefits the organism’s relatives, which will pass the gene on to subsequent generations.
If I slightly change words form above definition, I can now define a neighbor selection process as a cultural theory stating that a meme that causes an organism to exhibit behavior detrimental to its survival will increase in frequency in a population if that behavior benefits the organism’s neighbors, which will pass the meme on to subsequent neighbors.
We are now ready to look at network reciprocity:
Real populations are not well mixed, but have spatial structures or social networks which imply that some individuals interact more often than others. One approach of capturing this effect is evolutionary graph theory, in which individuals occupy the vertices of a graph. The edges determine who interacts with whom. If a cooperator pays a cost, c, for each neighbor to receive a benefit, b, and defectors have no costs, and their neighbors receive no benefits, network reciprocity can favor cooperation.
Basically, what I understand from the above is that if you help your neighbors sometimes such that the cost is not too high but benefits to neighbors are high and if cost to benefit compares favorably with average number of neighbors/ neighborly interactions you have, then in the long run you will benefit and this form of cooperation can evolve. To me the effects are mediated by the number of neighbors or sociability of a person.
Of course, even if you have all these mechanisms in place, cooperation may not evolve, as you may have free-riders. One important mechanism that has evolved to keep the free-riders in check is that of punishment. And once punishment is part of the picture you don’t even need repeated interactions, one-off games may be sufficient. I call this phenomenon Direct Punishment. One way it has been measured is with the Ultimatum game.
In the Ultimatum game, the second player can inflict costly punishment on first player by refusing to accept the division; this costly punishment is dyadic in nature and the aggression/hostility/vengefulness of the second player ensures that cooperation in even one-off encounters happens.
Basically instead of trusting and helping B, A starts by exploiting B and B retaliates by punishing A at cost to oneself.
Of course one can then surmise that there can be a phenomena of indirect punishment. This again may happen in two ways:
- Indirect punishment upstream: A is exploitative in nature; A exploits B; B punishes A, who then feels guilt/ gets reformed and stops exploiting C or even starts helping C.
- Indirect punishment downstream: A is exploitative in nature: A exploits B, B punishes A; B gets a reputation for being tough/competent and stops getting exploited by others say C or C may now even help B.
The Indirect reciprocity effects can be seen in Public goods/ trust game.
I will now take a detour and introduce the HEXACO model of personality which set me thinking about this in the first place.
HEXACO is an alternate personality model that is based on the same principles as the Big Five/FFM; i.e. it uses factor analysis of lexical terms in various languages to arrive at major personality traits.
The six factors are generally named Honesty-Humility (H), Emotionality (E), Extraversion (X), Agreeableness (A), Conscientiousness (C), and Openness to Experience (O). The personality-descriptive adjectives that typically belong to these six groups are as follows:
Honesty-Humility (H): sincere, honest, faithful, loyal, modest/unassuming versus sly, deceitful, greedy, pretentious, hypocritical, boastful, pompous
Emotionality (E): emotional, oversensitive, sentimental, fearful, anxious, vulnerable versus brave, tough, independent, self-assured, stable
Extraversion (X): outgoing, lively, extraverted, sociable, talkative, cheerful, active versus shy, passive, withdrawn, introverted, quiet, reserved
Agreeableness (A): patient, tolerant, peaceful, mild, agreeable, lenient, gentle versus ill-tempered, quarrelsome, stubborn, choleric
Conscientiousness (C): organized, disciplined, diligent, careful, thorough, precise versus sloppy, negligent, reckless, lazy, irresponsible, absent-minded
Openness to Experience (O): intellectual, creative, unconventional, innovative, ironic versus shallow, unimaginative, conventional
The factor H is a new factor not present in Big Five/FFM. The E though looking similar to N of big Five, is conceptually different; it no longer contains anger/hostility which are instead present in HEXACO A. similalrly there are important differences between HEXACO A and Big Five A. the other 3, C, O and X (extarversion) are similarly conceptualized and defined in both systems and have same loadings when tested together.
Ashton and Lee, the proponents of the HEXACO model, have themselves related evolution of altruism to these traits [pdf] and I am building on their work.
Basically as per them,
To begin, we have proposed that the Honesty- Humility and Agreeableness factors represent two complementary aspects of the construct of reciprocal altruism (Trivers, 1971). Honesty-Humility represents the tendency to be fair and genuine in dealing with others, in the sense of cooperating with others even when one might exploit them without suffering retaliation. Agreeableness represents the tendency to be forgiving and tolerant of others, in the sense of cooperating with others even when one might be suffering exploitation by them. (For a discussion of two broadly similar, although not identical, constructs, see Perugini, Gallucci, Presaghi, & Ercolani, 2003.) Presumably, high levels of Honesty- Humility are associated with decreased opportunities for personal gains from the exploitation of others but also with decreased risks of losses from withdrawal of cooperation by others. In a similar manner, high levels of Agreeableness are associated with increased opportunities for personal gains from long-run reciprocal cooperation with others, as well as with increased risks of losses from exploitation by others. (Note that we use the term altruism in terms of a dimension of altruistic versus antagonistic tendency, which involves both a willingness to help or provide benefits to others and an unwillingness to harm or impose costs on others.)In addition, we have proposed that Emotionality represents tendencies relevant to the construct of kin altruism (Hamilton, 1964), including not only empathic concern and emotional attachment toward close others (who tend to be one’s kin) but also the harm-avoidant and help-seeking behaviors that are associated with investment in kin (see also Lee & Ashton, 2004). Presumably, high levels of Emotionality are associated with increased likelihood of personal and kin survival, as well as with decreased opportunities for gains that are often associated with risks to personal and kin survival.
According to Indian Aesthetics , as outlined in Bharat Muni’s Natyashatra, there are eight Rasas or impacts that an aesthetic piece of work like dance form/ literary piece, tries to achieve/invoke in the beholder/reader. These can be loosely thought of as eight different kinds of aesthetic experiences.
As is evident I like all things eight, as I believe they have an underlying eight fold evo-devo stage structure behind them. In this case in visual art from each of the rasa is associated with a predominant color that signifies that rasa. For eg Shringar or Love/beauty/erotic rasa has as its color, color green.
Now, I have also blogged previously about color terms and how they may have evolved in an eight step model. In brief, I believe that Black came first , white next, then Red followed; after which followed yellow, blue and green and then other terms like orange, brown and grey followed. This I believe is also tied to the way our color vision and sensitivity would have grown/evolved.
Taking cue from that color term evolution model , I belive the eight rasas evolved in the same order as the color used to denote them, and that nicely fits with other aspects of the eight stage theory too, like the eight stage emotion development.
So, in essence, please find listed below the eight Rasaas in the correct eight stage order:
1. Bahyanak Rasa: color Black : emotion fear.
2. Hasya Rasa: color white: emotion joy/laughter
3. Rudra Rasa: color red : emotion anger
4. Adbhuta Rasa: color yellow , emotion wonder
5. Bibhitsa Rasa: color blue, emotion disgust
6. Shringar rasa: color green; emotion erotic/love
7. Veera rasa : color orange; emotion heroism
8. Karuna rasa: color grey; emotion compassion/ sadness.
Contrast this with the basic emotions list I have come up earlier viz.
1. Fear – Bahyanak
2. Joy/happiness – Hasya
3. Anger – Raudra
4. Sadness – Karuna
5. Disgust – Bibhitsa
6. Surprise – shringar
7. Contempt – Veera
8. Interest (anticipation) – Adbhuta
With just one switch between the Adbhuta (wonder/interest) and Karuna (sadness/ compassion), the eight rasas fit both the color term evolution and basic emotions evolution. That surely means we are at something and moving in the right direction as different routes are leading to the same destination. .
I have also advocated the four primary problems faced by all creatures undergoing evolution, as delineated by Theodore Millon– the problems of Existence; Adaptation; Replication and Abstraction which lead to polarities of pain/pleasure; active/passive; self/other and broad/narrow at each of the stages/domains/ solutions.
However, when we pause to look at what the mechanism of evolution actually is, we clearly note that there are a few prerequisites for evolution to take place and unless all the four mechanisms/ preconditions are present it is unlikely that the creatures will evolve. I have been having this in the back of my mind for quite some time especially as I have been ruminating on the BVSR (blind variation and selective retention) theory of Donald Campbell as applied to creativity.
I was recently reading ‘Driven’ and in that book too a lot of emphasis is placed on the V-S-R (Variation, Selection, Retention) mechanism of evolution. I think this popular portrayal of evolution misses another important ingredient required for evolution that of Struggle due to limited resources and excess fecundity. If the problem of limited resources and excess fecundity was not there, probably there would be no pressure to evolve.
Thus I would like to frame the four evolutionary prerequisites/ mechanisms as Struggle-Retention- Variation-Selection or S_R_V_S. To elaborate:
1. Struggle: This is driven by the fact of limited resources and overproduction due to excess fecundity. Here two strategies, leading to 2 polarities, work; one can either compete for resources or one can cooperate and exist symbiotically. Also, one can either have a r-strategy (low investment in many) of reproduction or A K-strategy (high investment in few). In the eight stage model, the organisms at first 2 levels would be primarily constrained by this evolutionary mechanisms.
2. Retention: There must exist some mechanism by which the traits that confer survival/reproductive or selection advantage can be retained over time in the same individual and over generations in the same species. Again the mechanism of stable trait over time as well as over generations may be in conflict with each other and may lead to a polarity. Creatures at stage 3 and 4 of 8 stage evo-devo theory would likely face issues regarding stability and retention of traits; retaining in individual the same trait is an active process; while retaining in generations is more passively driven.
3. Variation. There must exist some mechanism that causes minor changes in the stable traits such that variation may lead to deleterious or beneficial effect over the individual having that variation. This is classically implemented using mutations and sexual-recombinations. While mutations confer (dis)advantages at an individual level; recombinations take that to the next level by affecting offsprings variability. The creatures at stages 5 and 6 of evo-devo stages are grappling with these problems of adequate variation in self and other.
4. Selection: There must exist some selection criteria based on which the struggling creatures having stable but slightly varying traits can be selected for or against. While Natural selection (stage 7) employs the three methods of directional, stabilizing and disruptive selection; the stage 8 deploys a qualitatively different method of sexual selection where the criteria for selection may be arbitrarily driven by choices of the other gender conspesifics. While the Natural selection criteria is broad, the sexual selection criteria can be said to be narrow. Another way to look at this is that the selection crteria is either to survive (natural selction) or to reproduce (sexual slection) and those who are sucessful can very well move from one level/species to another (speciation due to sexual selection).
To me this is further corrobrating evidence of the eight stage evo-devo theory and ABCD model being on the right track.
This post is an ambitious attempt to link the four causes delineated by Aristotle, to the four questions asked by Tinbergen to the four types of explanations that can be made for any human/animal ability.
First a bit of a background.
Aristotle had listed four causes – Material, Efficient, Formal and Final causes. From the Wikipedia:
Aristotle held that there were four kinds of causes:
- A thing’s material cause is the material of which it consists. (For a table, that might be wood; for a statue, that might be bronze or marble.)
- A thing’s formal cause is its form, i.e. the arrangement of that matter.
- A thing’s efficient or moving cause is “the primary source of the change or rest.” An efficient cause of x can be present even if x is never actually produced and so should not be confused with a sufficient cause.(Aristotle argues that, for a table, this would be the art of table-making, which is the principle guiding its creation.)
- A thing’s final cause is its aim or purpose. That for the sake of which a thing is what it is. (For a seed, it might be an adult plant. For a sailboat, it might be sailing. For a ball at the top of a ramp, it might be coming to rest at the bottom.)
While studying these causes scholars have stressed on two sorts of distinctions, the first is the concept of actuality and potentiality– while some causes like the final cause (teeos or entelchiea) and formal cause (eidos or energiea) are actual; the material cause is deemed to be poetntial.
The other concept is that of Hylomorphism, or the distinction between matter and form. I believe that the four causes can be broken down along the two dimensions of potentiality/actuality and matter/form as below to lead to a 2×2 matrix of causes.
However, I like to arrange it slightly differently. I retain the ultimate/proximate distinction, but supplement it with Accidental/ Teleological distinction. Accidental to me means phylogeny due to random genetic drift and genetic baggage; and physiologic mechanisms like hormones etc kicked in accidentally by random interaction with immediate environment; on the other hand the process of adaptation and developmental unfolding to an adult form (ontogeny) appear purposeful and pseudo teleological. Thus my arrangement:
Which leads to how I became re- interested in these four causes recently- it was while reading an article by Dean Simonton on ability , wherein he conjectured that studying both the generic and specific factors that affect performance as well as acquisition of ability is problematic and non-fruitful, that I remembered about these and saw how fruitful it may be to conceptualize ability in just so many terms. Hence my conceptualization:
In general for ability I think the following four factors are applicable and all four have strong influences on ability; I have named them talent, hard work, grit and optimism etc elsewhere. In general for any trait like intelligence, emotionality etc I think the 2×2 factor matrix is relevant and worth keeping in mind.
That brings me eventually to my own levels of explanations for any phenomenon. I believe evo-devo explanations as well as psycho-social factors have equal weight-age while explaining say behavior. while some of these explanations are mechanistic/deterministic other are of non-deterministic or chaotic origin. Similarly, while some are governed by factors internal to the organism others are mostly affected by extrinsic factors.
I hope the above conceptualization makes sense. It is inline with my eight stage model and four domains model where Evo is stage 1&2; social- stage 3&4, devo- stage 5&6 and psycho stage 7&8.