A cross-validation of sex differences in the expression of depression

A considerable amount of evidence has accumulated indicating a greater rate of depression among females compared to males. In addition, recent investigations have revealed distinct patterns of depressive responding as a function of sex. The present study provided a cross-validational test of findings reported by Funabiki and colleagues. Male and female college students indicated the likelihood that they would engage in 79 behavioral analytically derived behaviors or cognitions if depressed. Stepwise discriminant function analyses were performed to determine maximum separation of male and female responses. This procedure yielded a 55.6% overall variable cross-validation rate. Many of the findings were consistent with Radloff and Rae's theoretical view of sex differences in learned susceptibility to depression. The data also suggest several avenues for future research and support the utility of investigating theories of depression within the context of a continuity between normal mood states and depressive phenomena.Useful comments on an earlier draft of this article were provided by Mark Hammarlund and Lorence S. Miller. The order of authorship was determined by the flip of a coin.     

An automated apparatus for the assessment of social preferences in rodents

Preference apparatuses offer a straightforward method for the assessment of social preference in a controlled manner. The present paper provides the information necessary for the construction of an automated preference apparatus for rodents and a demonstration of the operation of this apparatus. In a representative study,Peromyscus polionotus females demonstrated preference for intact over castrated males.     

Local dependence latent structure models

A local independence latent structure model, which assumesm latent classes, requires a minimum of 2m-1 items for the solution of the 2m ² latent parameters. If one adds 3 items to the test and if one assumes local dependence between pairs of items, thereby adding additional latent parameters, _ij , representing the association between itemsi andj, then it is possible to obtain estimates for all of the latent parameters: latent class frequencies latent probabilities, and measures of association between pairs of items. The solution consists of (1) forming (m + 1) × (m + 1) matrices of manifest data, which are singular, (2) solving for the _ij in equations that result from the singularity of the data matrices, (3) correcting the manifest data by removing the contamination due to local dependence, and (4) estimating the remaining latent parameters from the corrected data, using methods outlined in earlier literature.     

Visual and tactual form complexity:A psychophysical approach to perceptual equivalence

Equivalence of two modalities for processing form-complexity information was investigated by obtaining category judgments of the complexity of 100 random forms from 40 Ss who explored the forms visually and 40 Ss who explored them tactually. Intercorrelations of judgments and multiple regression analyses with form measures indicate that information was used in the same fashion independent of input modality. Latencies were interpreted as reflecting information gaining and processing capabilities.     

The role of values in the choice shift

In Study I, the self-ideal discrepancy in risk taking was found to be unrelated to the strength of values relevant to the risks under consideration, and the other-self discrepancy was found to be related to these values only by virtue of one of its components, inital preference. Hence the use of these discrepancies as measures of value strength must be questioned. This casts doubt on some of the evidence formerly thought to support the assumption that values provide the force that drives the choice shift. In Study II, two hypotheses derived from this assumption were not supported. In light of this result, and closely related negative findings from two other studies, it would appear that this assumption must either be discarded or revised. Some possible lines of revision are suggested. Some of the results were also prejudicial to two theories about the mechanism through which values or other forces allegedly produce the shift: norm-comparison theory and pluralistic-ignorance theory.     

Commitment to Justice in Conflict between Unequal Status Persons

Possible determinants of a high-status person's conformity to the norm of justice and the consequences of this conformity on conflict resolution were explored. Ninety-six college students were induced to be high-status bargainers. Subjects believed that their partner was committed either to their group's self-interest or to justice in the conflict. Subjects negotiated with an opposing low-status bargainer who made a self-advancement appeal, an appeal based on an equity concept of justice, or an appeal based on a responsiveness to needs concept of justice. As predicted, subjects who believed that their partner was committed to justice as compared to the group's self-interest agreed more often to the low-status person's request for improved outcomes and indicated that they had a higher level of motivation to be just, more seriously considered the low-status person's position and situation, and were more willing to compromise. Contrary to expectations, subjects who were targets of the justice appeals did not agree significantly more often to the low-status person's request nor did targets of the self-advancement appeal. The data suggest that the norm of justice may elicit conformity when invoked by a group member, though it may induce little conformity when invoked by an opposing bargainer. Results were also interpreted as suggesting that seeking to do justice induces compromises toward the other bargainer's position by reducing egocentric biases.     

The effects of thematic context and presentation mode on memory for sentence voice

A sentence in discourse may appear in the passive voice to emphasize the logical object rather than the logical subject when it is thematically more important. Two experiments are reported that explore the impact of this textual function of voice on sentence memory. The first experiment required subjects to listen to prose passages and then recall them. Sentences were recalled predominantly in the active voice regardless of voice or thematic focus in the prose passage, showing that the English-language bias for the active voice was a more important determinant of sentence reconstruction than was the experimental manipulation of thematic context. The second experiment required subjects to listen to or read either prose passages or lists of unrelated sentences and then to try to recognize key sentences that were either unchanged or changed lexically, semantically, or in voice. Recognition, both overall and specifically for voice, was better for sentences that were read than for those that were heard, and recognition for semantic change was consistently higher than for any other. Only when passages were read was there evidence in support of a thematic textual influence on memory for sentence voice.This research was supported in part by NIMH Grant 32063.     

Cerebral lateralization and reading dysfunction

The laterality preference patterns and types of oral reading errors were examined for 90 seventh-grade males. Specifically, scores on a self-report measure of lateral preference for 30 readers with adequate decoding skills but low comprehension and 30 readers who lacked decoding skills were compared with each other and with 30 good readers. As predicted, poor readers with grade appropriate word recognition scores were found to be generally more confused in their lateral preference than were good readers or poor readers who lacked decoding skills. Results of oral reading errors confirmed a visual integration problem for the more bilateral reader. Poor comprehenders with word recognition skills also reported significantly greater mixed lateral patterns for their fathers than did other readers. The results were interpreted as supporting the initial argument that difference-poor readers fail to comprehend because of problems in organizing visual input, which seems intimately tied to a bilateralization of functions.     

Laterality differences in sensitivity to line orientation as a function of adaptation duration

Since available evidence indicates that the two cerebral hemispheres are differentially sensitive to different types of stimulus information, and that they also utilize different strategies in processing information, is it possible that the two hemispheres are differentially sensitive to adaptation? Three groups of four subjects each were adapted to black and white gratings using three adapting durations: 500, 1,000, and 5,000 msec. Immediately following adaptation, a test grating was presented in either the left or right visual field. The task of the subject was to determine whether the lines of the adapting and test gratings had the same orientation or not. Analysis showed that in the 5,000-msec and 1,000-msec conditions, more errors occurred with left visual field presentations, responses to left visual field presentations took longer, and a bias-free measure showed that subjects were more sensitive to right visual field presentations. For the 500-msec group, there were no apparent differences between left and right visual fields presentations. The results indicate differential effects of adaptation on the two hemispheres, suggesting sensitivity differences between the two halves of the brain.