Knowledge that Transforms

A visual preference procedure was used to examine 6- and 41/2-monthold infants’ sensitivity to phrase structure in music. Sections of Mozart minuets were divided into segments that either did or did not correspond to the phrase structure of the music. Infants in both age groups listened significantly longer to the appropriately segmented versions. Their behavior accorded well with judgments of the same materials made by adults, suggesting that protracted musical experience may not be necessary to perceive phrase structure in music. Strong correlations were found between certain musical variables and the infants’ preferences for the musical passages, pointing to acoustic properties that may be important for defining musical phrases.

If a long series of gambles is subjectively structured into units each consisting of a string of consecutive losses followed by a win, positive valued strings will be short and negative valued strings will be long. Long negative strings will be temporally discounted more than short positive strings, increasing the gamble's subjective value. People, therefore, may gamble because even games of objectively negative expected value may be subjectively positive. People may keep gambling despite heavy losses because reduction of degree of discounting and expansion of the behavioral unit, characteristics of selfcontrol in other areas, fail to significantly decrease a gamble's subjective value.

The role of genetic and environmental factors in the expression of religious interests, attitudes, and values was examined using data from adult twins reared apart and adult twins reared together. The Religious Values scale of the Allport-Vernon-Lindzey Study of Values, a Religious Interest scale from the Strong Campbell Interest Inventory, the Wiggins Religious Fundamentalism scale from the MMPI, a Leisure Time Religious Interest scale, and a second measure of Occupational Religious Interest were administered to 53 identical and 31 fraternal twin pairs who had been reared apart. The Leisure Time Religious Interest Scale and the second measure of Occupational Religious Interest were also administered to 458 identical and 363 fraternal twin pairs who had been reared together. Biometric model fitting indicated that approximately 50% of the observed variance of all five measures is genetically influenced.

Observers viewed pairs of alternating photographs of a human body in different positions. Shortest-path motion solutions were pitted against anatomically possible movements. With short stimulus onset asynchronies (SOAs), observers tended to report the shortest path despite violations of anatomical constraints. However, with longer SOAs observers became increasingly likely to report the anatomically possible, but longer, paths. This finding, in conjunction with those from a second study, challenges the accepted wisdom that apparent motion paths are independent of the object. Instead, our findings suggest that when given enough time and appropriate stimuli, the visual system prefers at least some object-appropriate apparent motion paths.

Two hypotheses have been offered to explain the relation between testosterone and antisocial behavior in delinquent and criminal populations. One is that testosterone leads directly to antisocial behavior. The other is that a constellation of dominance, competitiveness, and sensation seeking associated with testosterone leads to either antisocial or prosocial behavior, depending upon an individual's resources and background. Analysis of archival data from 4,462 U.S. military veterans supported the first hypothesis: Testosterone was correlated with a variety of antisocial behaviors among all individuals. However, socioeconomic status (SES) proved to be a moderating variable, with weaker testosterone-behavior relationships among high SES subjects.

The question of when people rely on stereotypic preconceptions in judging others was investigated in two studies. As a person's motivation or ability to process information systematically is diminished, the person may rely to an increasing extent on stereotypes, when available, as a way of simplifying the task of generating a response. It was hypothesized that circadian variations in arousal levels would be related to social perceivers' propensity to stereotype others by virtue of their effects on motivation and processing capacity. In support of this hypothesis, subjects exhibited stereotypic biases in their judgments to a much greater extent when the judgments were rendered at a nonoptimal time of day (i.e., in the morning for “night people” and in the evening for “morning people”). In Study One, this pattern was found in probability judgments concerning personal characteristics; in Study Two, the pattern was obtained in perceptions of guilt in allegations of student misbehavior. Results generalized over a range of different types of social stereotypes and suggest that biological processes should be considered in attempts to conceptualize the determinants of stereotyping.

After decades of research it is now possible to offer a coherent, data-based theory of work motivation and job satisfaction. The present model combines aspects of the following theories: goal setting, expectancy, social-cognitive, attribution, job characteristics, equity, and turnover-commitment. The resulting model is called the high performance cycle. It begins with organizational members being faced with high challenge or difficult goals. If high challenge is accompanied by high expectancy of success or self-efficacy, high performance results, given that there is: commitment to the goals, feedback, adequate ability, and low situational constraints. High performance is achieved through four mechanisms, direction of attention and action, effort, persistence, and the development of task strategies and plans. High performance, if rewarding, leads to job satisfaction, which in turn facilitates commitment to the organization and its goals. The model has implications for leadership, self-management, and education.

A number of important models of information processing depend on whether processing is serial or parallel. However, many of the studies purporting to settle the case use weak experimental paradigms or results to draw conclusions. A brief history of the issue is given along with examples from the literature. Then a number of promising methods are presented from a variety of sources with some discussion of their potential. A brief discussion of the topic with regard to overall issues of model testing and applications concludes the paper.

Recognition that organisms have a developmental history, exhibit behavior that is uniquely suited to or constrained by features of their immediate environment, and adapt to new environments is central to current psychobiological thought. Unfortunately, these concepts have in the past been restricted largely to the study of postnatal behavioral development. However, recent extension of these concepts to the fetus as an active and interactive organism that resides within a specialized, intrauterine niche is proving to be a profitable approach toward understanding the origins of behavioral organization during development.

Scientists and philosophers have searched for centuries for a parsimonious answer to the question of what constitutes beauty. We approached this problem from both an evolutionary and information-processing rationale and predicted that faces representing the average value of the population would be consistently judged as attractive. To evaluate this hypothesis, we digitized samples of male and female faces, mathematically averaged them, and had adults judge the attractiveness of both the individual faces and the computer-generated composite images. Both male (three samples) and female (three samples) composite faces were judged as more attractive than almost all the individual faces comprising the composites. A strong linear trend also revealed that the composite faces became more attractive as more faces were entered. These data showing that attractive faces are only average are consistent with evolutionary pressures that favor characteristics close to the mean of the population and with cognitive processes that favor prototypical category members.