Still cautious: Personality characteristics of extremely low birth weight adults in their early 30s

Extremely low birth weight survivors (ELBW; <1000 g) display a personality style characterized by cautiousness, shyness, and risk aversion in their 20s. We examined whether non-impaired ELBW survivors were still more cautious than their normal birth weight (NBW) peers at ages 30–35 and assessed the stability of this personality characteristic across approximately a decade in the oldest known cohort of ELBW survivors. Of the 154 participants tested at ages 22–26, 111 (i.e., 72%) of them returned approximately 10 years later [i.e., 69% (49/71) ELBW and 75% (62/83) NBW], and once again they completed the Eysenck Personality Questionnaire-Revised (EPQ-R). We created the same theoretically and empirically derived composite measure of cautiousness at each visit by summing the EPQ-R psychoticism scale (reverse scored) and the EPQ-R lie scale. We found that ELBW adults reported higher cautiousness than their NBW counterparts at ages 30–35. We also found that levels of cautiousness remained stable over approximately 10 years in both groups. Our findings suggest that individuals born at ELBW were more cautious than NBW peers and that this personality characteristic remained stable into their early 30s. The present study appears to be the first empirical demonstration of personality stability among adult ELBW survivors.     

Repeated measurement of salivary cortisol within and across days among shy young adults

Temperamental shyness emerges early in childhood and remains relatively stable throughout development and has been associated with high and low levels of the stress hormone cortisol. Studies examining the relation between shyness and cortisol have been limited because they have traditionally collected only one measure of cortisol on a single day in the laboratory, restricting the reliability and diurnal profile of the measure in the participant’s everyday environment. We collected 15 saliva samples across three separate days (i.e., upon waking, +60 min post-waking, +8 h post-waking, +10 h post-waking, and bedtime) in a sample of healthy young adults selected for high and low shyness in order to characterize a portion of the diurnal cortisol rhythm. Overall, shy individuals demonstrated relatively lower cortisol across the day and across multiple mornings than non-shy adults. Higher self-reported social anxiety across multiple measures was also related to lower total cortisol levels across all participants. The present study replicates and extends our previous findings of low salivary cortisol measured in the laboratory in shy adults to repeated measurement in their everyday environments.     

ASSOCIATION STRUCTURES OF MENTAL RETARDATES

Free word associations of low level retardates (I.Q., 48) and higher level (I.Q., 67) retardates were examined for evidence of normal adult word association structures (idiodynamic associative sets). Such structures were found in both groups. The low level group, however, evidenced a factor structure different from that typical of normal adults. From a semantic point of view, associations of the low level group were more “concrete” than those of the higher level group. From a syntactic point of view, the lower level group lagged well behind the higher level group on the so-called “syntactic-paradigmatic” shift.     

THE DEVELOPMENT OF NONMETRIC SPACE ANALYSIS: A LETTER TO PROFESSOR JOHN ROSS

A series of recent studies (Cliff, 1968, 1969; Cliff, Bradley, and Girard, 1970) describe a mathematical model for the cognitive processes involved in an individual's endorsements (or nonendorsements) of personality inventory items. In this model, the inventory items are assumed to occupy positions in a multidimensional space of subjective meaning, and the probability of endorsement is assumed to be some mathematical funotion of these positions.     

The Relation Between Executive Function and Theory of Mind is More Than Skin Deep

A simple “expression” account of the relation between executive function (EF) and children's developing theory of mind (ToM) has difficulty accounting for the generality of the changes occurring in children's mental-state understanding during the preschool years. The current study of preschool children (N = 43) showed that EF—especially conflict EF—related uniformly to ToM measures that imposed either high or low executive demands, independent of verbal ability. These findings can be explained within an emergence account wherein executive skills are implicated in the acquisition of mental-state concepts as opposed to merely the expression of these concepts in task performance.     

The Irony of Measurement by Subjective Estimations

In 1948 S. S. Stevens, in his famous Science article, proposed a theory of measurement that radically differed from the dominate theory of the time. The dominate theory held that all strong forms of scientific measurement— for example, those that yielded ratio scales—had to be based on an observable ordering and an observable commutative and associative operation. Stevens proposed different criteria and introduced his method of magnitude estimation. Stevens as well as measurement theorists considered his method to be radically different from those based on commutative and associative operations. Although his method was controversial, it became a standard tool in the behavioral sciences. This article argues that Stevens' method, together with implicit assumptions he made about the scales of measurement it generated, is from a mathematical perspective the same as the measurement process based on commutative and associative operations. The article also provides a theory of qualitative numbers and shows an interesting relationship between qualitative numbers and Stevens' method.     

Respective contributions of inhibition and knowledge levels in class inclusion development: a negative priming study

Dempster ( Dempster, 1995 ; Dempster & Corkill, 1999 ) proposed that developmental changes in performance on Piagetian tasks could be related to changes in inhibitory efficiency more than to logical development. In this study, the negative priming paradigm was adapted to the class inclusion task in order to investigate the role of inhibition and knowledge levels in the development of class inclusion. Participants were pre‐tested on two inclusion tasks, the standard Piagetian task and Markman's modification task, and assigned to different knowledge levels: empirical, and logical necessity. Children were then tested on a priming version of the class inclusion task. Results showed a negative priming effect, indicating that the irrelevant ‘subclass comparison strategy’ was actively inhibited during the processing of the class inclusion task. This effect was found to vary as a function of knowledge levels, indicating that the need for inhibition was reduced when children had attained logical necessity.     

Dialogue Concerning Natural Appropriation

Two utilitarian defenses, traceable to Bentham and Mill, arecommonly offered for patents. It is contended that patents induce innovation, and thatpatents induce disclosure of innovation. Patents on some or all of the human genomepose particular challenges for these defenses. In the first instance, patents on nucleotidesequences entail the perverse notion of human reproduction qua infringement. In the second place, when such patents are available (as is presently the case), the two defenses involve a counterfactual claim, viz., that if there were no such patents, biotechnological progress would wane. Even if these challenges are met, concerns about respect for humanity generate opposition to property interests in compounds manipulated outside the human body but significantly homologous to compounds found in humans. This stance about things human might appear to commit the fallacy of division. In a dialogue between a Kantian and a utilitarian, arguments for and against property interests in the human genome are presented.