A classical IQ model of the stages of cognitive development

Based on the construct of classical IQ (mental age/chronological age), a model of the proportions of the population at various stages of cognitive development as a function of age is proposed. The model, which accounts well for empirical data for the age range 13 through 17 years, is shown to compare favorably with other theoretical models. The success of the model provides further evidence of the salience of the construct of general cognitive capacity in differential psychology.     

The web of work for technical and managerial employees

This study examines aspects of the job and off-job lives of technical and managerial employees. A framework for studying parallel dimensions in these two life spheres is developed. Variables include alienation—powerlessness and meaninglessness—and activities—variety, control, social interaction, and purpose. Findings show strong interaction between alienation from work and that experienced from life off the job. Limited relationships between activity dimensions were found. Overall, results suggest that employees' feelings of alienation carry over strongly between the two life spheres but that only limited carry-over occurs between job activities and those away from work. Findings give no support to the compensatory view of relationships between employees' job and off-job lives.     

Tests of symmetry in three-way contingency tables

Three-dimensional contingency tables are analyzed, with one variable (e.g., sex) as a factor, and with a natural relation between the other variables (e.g. left and right eye vision). Models of special interest, like symmetry and proportional symmetry between the related variables, and homogeneity across the factor levels, are investigated. Maximum likelihood estimators of parameters and partitions of chi-square goodness-of-fit statistics are explicitly presented; the independence of certain models is noted, and an example is discussed.     

Detection of Fs in a single statement: The role of phonetic recoding

Most college-student readers have difficulty in detecting the letter F in instances of the word OF embedded in a single statement. Throughout a series of five experiments designed to clarify the basis of these detection failures, their unique and robust nature was demonstrated. The detection failures persisted in spite of repeated attempts to detect the letters by subjects who, in separate conditions and experiments, first memorized or copied the statement, or who, for purposes of comparison, also detected the O in OF, the N in ON, or the F in IF, or who read the statement in a number of physical formats, which included lower and upper letter cases, scrambled syntax, unsegmented letter strings, and vertical (list) presentation. Although many of these manipulations significantly improved performance, none produced perfect performance or performance comparable to the detection of F in IF. Several hypotheses, including those of redundancy, unitization, and phonetic recoding, were tested as explanations of the detection failures: The hypothesis that received the strongest support was that of phonetic recoding. This hypothesis focuses upon the atypical pronunciation of F as/v/(as in the word OF), rather than as the more typical/f/. In short, this reading illusion was concluded to be, in large part, a result of the subjects’ scanning their acoustic rather than their visual images of the printed word.     

Effects of divided attention and word concreteness on correct recall and false memory reports

Lists of thematically related words were presented to participants with or without a concurrent task. In Experiments 1 and 2, respectively, English or Spanish word lists were either low or high in concreteness (concrete vs abstract words) and were presented, respectively, auditorily or visually for study. The addition of a concurrent visual or auditory task, respectively, substantially reduced correct recall and doubled the frequency of false memory reports (nonstudied critical or theme words). Divided attention was interpreted as having reduced the opportunity for participants to monitor successfully their elicitations of critical associates. Comparisons of concrete and abstract lists revealed significantly more recalls of false memories for abstract than concrete word lists. Comparisons between two levels of attention, two levels of word concreteness, and two presentation modalities failed to support the "more is less" effect by which enhanced correct recall is accompanied by increased frequencies of false memories.     

Acculturation and contact in Japanese students studying in the United Kingdom

Acculturation theory has been the dominant model that investigators use in examining the effects of transmigration. This theory indicates the problematic effects of intercultural contact in terms of adjustment and stress. One criticism of this theory, however, is its lack of integration with the more generic contact literature. This literature suggests that intergroup contact can have positive effects on intergroup relations. The authors presented a longitudinal study of 35 Japanese nationals living in the United Kingdom over a period of 12 months. The present results suggested that both conventional acculturation variables (e.g., language ability and perceived cultural distance) and intergroup variables (e.g., in-group bias and intergroup anxiety) were associated with acculturative stress and psychosomatic illness over time. Higher intergroup anxiety was associated with increased acculturative stress, whereas higher in-group bias was associated with reduced psychosomatic illness. The present results indicated the possibility that these variables add an important dimension to the acculturation literature.     

The redux of cognitive consistency theories: evidence judgments by constraint satisfaction

The authors suggest that decisions made from multiple pieces of evidence are performed hy mechanisms of parallel constraint satisfaction, which are related to cognitive consistency theories. Such reasoning processes are bidirectional--decisions follow from evidence, and evaluations of the evidence shift toward coherence with the emerging decision. Using a factually complex legal case, the authors observed patterns of coherence shifts that persisted even when the distribution of decisions was manipulated (Study 1) and influenced by the participants' attitudes (Study 2). The evaluations of the evidence cohered with the preferred decision even when participants changed their preference (Study 3). Supporting the bidirectionality of reasoning. Study 4 showed that assigning participants to a verdict affected their evaluation of the evidence. Coherence shifts were observed also in related background knowledge. This research suggests that cognitive consistency theories should play a greater role in the understanding of human reasoning and decision making.     

An age-embedding effect: time sensitivity and time insensitivity when pricing health benefits

Benefits are often extended over time. One determinant of this benefit duration is how long a person will live to enjoy them. In four studies, we investigated whether people are sensitive to age when pricing benefits that will last for the remainder of one's life. In Study 1 drivers gave their willingness-to-pay (WTP) to cure a medical condition which would stop them from driving. Results showed an age-embedding effect: WTP was unrelated to the estimated number of driving years left. Study 2 tested whether age-embedding arose because people have a lot of information about themselves which dilutes the impact of age on their valuations. In Studies 3 and 4 we investigated whether people believed that age was an important consideration, or if they failed to properly incorporate it into their judgment. Results indicate that little weight is given to age when making individual pricing decisions, although people did not believe it was normatively irrelevant.     

Course of Treatment During a Cohort-Based Inpatient Program for Posttraumatic Stress Disorder

This study examined one group of veterans with post-traumatic stress disorder (PTSD) over the course of a four month inpatient treatment program. The aim of the study was to examine treatment process factors that may contribute to the generally poor outcome reported in previous studies. Group members made weekly ratings in the domains of PTSD symptoms, morale, interpersonal relationships, and physical problems. Results contrasted with clinical assumptions usually made regarding the treatment process in these programs. Despite an appearance of cohesion among group members, variation of scores on functional domains was explained largely by individual differences. Progress through the program showed a strongly linear pattern, with no phase effects. Somatic complaints did not increase during the phase when traumatic material was explored. Degree of improvement or worsening was best predicted by level of PTSD symptoms at admission, indicating that more symptomatic veterans did worse in the program. Additional factors of race, combat exposure, childhood abuse, and application for disability had no effect on the process variables measured.