In defense of adaptive preferences

An adaptive preference is a preference that is regimented in response to an agent’s set of feasible options. The fabled fox in the sour grapes story undergoes an adaptive preference change. I consider adaptive preferences more broadly, to include adaptive preference formation as well. I argue that many adaptive preferences that other philosophers have cast out as irrational sour-grapes-like preferences are actually fully rational preferences worthy of pursuit. I offer a means of distinguishing rational and worthy adaptive preferences from irrational and unworthy ones. The distinction is based on the agent’s own appraisal of the adaptive preference.

Identifying child temperament types using cluster analysis in three samples

Although previous research has explored the existence of temperament clusters in children, these studies have used single samples, reducing generalizability, and broad temperament constructs to identify clusters, obscuring fine-grained dimensional differences. To address these limitations, the current study identified a common cluster structure across two diverse samples of preschool children using the same fine-grained temperament measure (ns = 96, 187), then verified the cluster structure on a large, nationally-representative sample (n = 757). A consistent six-cluster solution was identified across the three samples: Unregulated, Regulated, High Reactive, Bold, Average, and Well-Adjusted. Demonstration of a replicable typology advances the understanding of temperament in childhood, and provides a parsimonious way to communicate complex information about a child’s temperament to parents and caregivers.     

Developing a model for adult temperament

Hierarchical relations among theoretically generated lower order scales of adult temperament were explored in two studies. In Study One, 258 undergraduates completed the Adult Temperament Questionnaire (ATQ). A five-factor model emerged from exploratory factor analysis, with factors labeled Orienting Sensitivity, Effortful Control, Extraversion, Affiliativeness, and Negative Affect. This model showed considerable convergence with the Big Five. Study Two, with a community sample of 700 participants, yielded a six-factor model, distinguishing aggressive negative affect from non-aggressive negative affect. Relations of the six temperament factors to Cloninger’s TCI, the Five Factor Model, and the Multi-Language Seven were investigated, providing support for the discriminating power of the six-factor temperament model in understanding individual differences in adult temperament and personality.     

A multiple-risk interaction model: Effects of temperament and divorce on psychiatric disorders in children

Effects of family status on the trajectory of problematic temperament-adjustment at 1 to 10 years of age and associated psychiatric disturbance 8 years later were examined in an epidemiological sample of 648 children. After adjusting for predivorce temperament-adjustment and background factors, logistic regression yielded independent effects of single custodial mother (SCM) family status for increased risk of disruptive and anxiety disorders, and of stepfamily status for increased risk of disruptive disorders. Increased risk of psychiatric disorders was more pervasive for SCM family boys versus intact family boys than for SCM family girls versus intact family girls, however only significantly more so for depression. No significant sex interaction was observed for stepfamily status. When girls and boys were treated independently, patterns of family status and outcomes of internalizing disorders varied. In stepfamilies, an elevated risk of depression and anxiety disorders was observed in girls but not boys, whereas in SCM families an elevated risk of depression was observed in boys but not girls. Within each family status group there was support for an altered risk of later psychiatric disorders given specific problematic predivorce temperament-adjustment characteristics. Implications for future research and treatment are discussed.The research described was supported by grants from the National Institute of Mental Health and by the W. T. Grant Foundation.     

A factorial study of temperament

The theory is advanced that personality factors obtained in the first order may often represent combinations of temperament traits that occur in the experimental population. Under these circumstances an investigation of the second order represents a purification process and yields factors which represent the more basic or pervasive characteristics of the original behavior items included in the factorial study. These second-order factors can be obtained directly in the first order by a careful selection of the variables which enter into the analysis. A second-order analysis was undertaken of the nine factors inherent in three of J. P. Guilford's inventories, and four clearly interpretable second-order factors were obtained. Three of these factors were obtained directly in the first order in a new factorial study of twenty-two behavior items. Attention is drawn to the similarities between these factors and traits of temperament postulated by an independent investigator.This paper abstracts portions of the writer's Ph.D. dissertation.     

Incentive and feedback effects on target detection: A chronometric analysis of Gray's model of temperament

Chronometric (i.e. reaction time) techniques were used to investigate the response, arousal, and attentional components of Gray's (1971, 1982) model of temperament. Subjects were tested in a game context, where each trial consisted of an incentive warning signal (positive or negative), a visual detection target (left or right visual field), and a feedback signal (positive or negative). Several findings were consistent with Gray's proposal that extraverts tend to respond impulsively given signals of reward whereas introverts respond with inhibition given signals of punishment. Extraverts made more overall errors than introverts in the first experiment, and more errors following positive incentive signals in the second study. In addition, introverts responded more slowly than extraverts following negative feedback in the first study. Evidence was also found in support of Gray's proposal that introverts allocate more attention to negative cues than extraverts. Following negative feedback, introverts showed a reflexive attentional bias in favor of negative locations in the second experiment. However, no support was found for the temperamental differences in phasic arousal suggested by Gray's model. The magnitude and build up of general alerting effects following positive and negative incentives were similar for introverts and extraverts.     

A duration model analysis of consumer preferences and determinants of video game consumption

Despite the enormous revenues generated by the video game industry in recent years, relatively little research has been undertaken into consumer preferences and the determinants of video game consumption. This study addresses this deficiency through the analysis of data from a popular online video game that includes historic behavioural information for 1,408 consumers participating in 728,811 unique rounds of gameplay. We analyse these data with the goal of estimating determinants of the aggregate amount of time that a consumer spends playing the game. Through the estimation of duration models, we show that less experienced consumers are less likely to continue playing the game at any given point, possibly due to having achieved mastery and becoming bored. However, we also find that consumers tend to play the game for longer periods when using a wider range of character roles and vehicles, implying that a consumer's interest can be maintained through exposure to greater variety. Our results represent the first such evidence on in‐game consumer preferences, which has important implications for video game consumption through optimisation of gameplay experiences to satisfy these preferences.     

Some factors of temperament: A re-examination

By application of the technique presented earlier, the factors found by the Guilfords in two studies of personality factors are reanalyzed. The rotation technique for the isolation of meaningful factors relates the factors of the two studies to each other through three common items, and to other factors and traits appearing in the literature of personality measurement. For each of four of the factors resulting from the analysis of the first battery there is close agreement with its counterpart from the analysis of the second battery with respect to loadings of the three common items. These factors are interpreted as perseverance, surgency, flexibility, and tension. Other factors appearing in only one or the other of the batteries are tentatively identified.     

Fitting and testing carroll's weighted unfolding model for preferences

A quadratic programming algorithm is presented for fitting Carroll's weighted unfolding model for preferences to known multidimensional scale values. The algorithm can be applied directly to pairwise preferences; it permits nonnegativity constraints on subject weights; and it provides a means of testing various preference model hypotheses. While basically metric, it can be combined with Kruskal's monotone regression to fit ordinal data. Monte Carlo results show that (a) adequacy of true preference recovery depends on the number of data points and the amount of error, and (b) the proportion of data variance accounted for by the model sometimes only approximately reflects true recovery.This study is based on a doctoral dissertation submitted to the University of Illinois at Urbana-Champaign. The author wishes to thank the members of his dissertation committee—Lawrence E. Jones, Chairman, Charles Lewis, Stephen Golding, Ledyard Tucker, and Nancy Wiggins—for their helpful comments.     

The Platonic model: statement,clarification and defense

I defend Gary Watson's Platonic Model of free agency against two arguments by counterexample, one by J. David Velleman and the other by Michael Bratman. I claim that these arguments are unconvincing for three reasons. First, they do not accurately target the Platonic Model. Second, they do not convincingly present cases of self-governed action. Third, they call attention to issues about theoretical commitments that are not fit to be settled by appeal to cases. On the basis of this discussion, I draw some general lessons for the debate about which theory of self-governance is the best.     

A comparison of temperament in nonhuman apes and human infants

The adaptive behavior of primates, including humans, is often mediated by temperament. Human behavior likely differs from that of other primates in part due to temperament. In the current study we compared the reaction of bonobos, chimpanzees, orangutans, and 2.5-year-old human infants to novel objects and people - as a measure of their shyness-boldness, a key temperamental trait. Human children at the age of 2.5 years avoided novelty of all kinds far more than the other ape species. This response was most similar to that seen in bonobos and least like that of chimpanzees and orangutans. This comparison represents a first step in characterizing the temperamental profiles of species in the hominoid clade, and these findings are consistent with the hypothesis that human temperament has evolved since our lineage diverged from the other apes in ways that likely have broad effects on behavior. These findings also provide new insights into how species differences in ecology may shape differences in temperament.     

A twin study of personality and temperament during middle childhood

In a study of 105 same-sex twin pairs, ages 7 to 10 years, maternal ratings on 23 bipolar scales yielded six factors designated as compliant morality, applied cognitive, sociability, emotionality, tough-mindedness, and activity-distractibility. Analyses by twin pairs (68 identical, 37 fraternal) indicated that correlations for identical pairs were significantly higher than fraternal pairs on all but one factor: tough-mindedness. Profile analyses for the six factors indicated that the profiles of scores across the factors were more concordant for the identical twin pairs. Correlations obtained from the individual scales produced differences between the identical and fraternal twin pairs as well. Overall, the data suggested that several components and the total organization of those components of personality and temperament are genetically influenced.     

Vital exhaustion,temperament, and the circumplex model of affect during laboratory-induced stress

The present study examined the relationship between vital exhaustion, Cloninger's temperament dimensions, and state affects during experimentally induced stress among participants aged 22–37 years. Larsen and Diener's circumplex model of affect was used to structure the self-reported affects. Temperament was measured by the Temperament and Character Inventory. Feelings of exhaustion were assessed by the Maastricht Questionnaire. Stressors used were an aversive startle task, an appetitive mental arithmetic task, and an aversive choice-deadline reaction time task. The results showed that the level of vital exhaustion among healthy persons is related to unpleasant state affects other than state fatigue. Temperament also modified the relationship between vital exhaustion and affects. In addition, vital exhaustion was related to a tendency to behavioural inhibition (harm avoidance). Our findings suggest that temperament is related to feelings of exhaustion and is likely to predispose to negative affectivity when accompanied by exhaustion.