Examination performance in lecture-discussion and personalized instruction courses

Students enrolled in a Psychology of Learning course were assigned to either a lecture section, one of two similar personalized instruction sections, or a fourth section that rotated across all three teaching procedures. All students took identical midterms and a final examination. After correcting test performance for differences in the cumulative grade point average of students in the four sections, examination performance of students in the personalized sections was found to be superior to that of students in the lecture section. An analysis of class section examination performance by item type revealed that students in the lecture section scored lower on all item types, but the greatest differences occurred on items that required written responses (essay and fill-in items) rather than recognition responses (multiple choice items). A gross analysis of student performance in the class rotated across the instructional procedures suggests that personalized instruction had its greatest impact on students with "average" to "poor" academic records.     

Associative responding versus analogical reasoning by children

Following upon work which showed that college and high school students' analogy solutions were predictable from ratings of the relatedness of the words comprising the analogy choices, this study extended those results to children's analogy solutions. Achenbach's Children's Associative Responding Test was used as the criterion to determine (1) whether analogy solutions by children were as related to word relatedness ratings as analogy solutions were in previous subject samples, (2) whether individual differences in using associative responding versus analogical reasoning processes could enhance the predictability estimates, and (3) whether associative priming can affect analogy solutions. Two correlational studies were done, one on an American and another on a Nigerian sample. A third study was an experimental manipulation of choices on analogy items on an American sample. The results suggest that the answer to questions (1) and (3) is yes, but the answer to question (2) is no.     

An Experimental Study of Black-White Negotiations1

One hundred and forty variables tapping aspects of the subjective culture (characteristic way or perceiving the social environment) of 300 white male students were subjected to two-mode factor analysis. Five subject types emerged from the similarities in the responses of the students to these variables. In the next phase of the study, 88 representatives of these subject types participated in experimental negotiations. Before the negotiations, caucus groups, consisting of six students homogeneous in their pretest scores, decided what positions should be upheld during the negotiations. Following the caucuses, three two-member teams were formed, from each caucus group. The teams negotiated with two-member black teams of confederates of the experimenters. Negotiations focused on three issues, each of which was represented by 10 Thurstone successive-interval method scaled positions. Negotiation outcomes were predicted from the subjective culture measures (r= .42; p < .005). The negotiation outcomes tended to be more predictable from the reference group (caucuses) preferred positions (r= .65) than from individual preferences (r= .36). Negotiators tended to overconform to caucus positions. Behavioral differential scale ratings of black negotiators predicted the outcomes better than semantic differential ratings of these stimuli. The more specific the attitude measured the more predictive it was of negotiation outcomes. Discussion focused on implications for understanding the relationship between attitudes and behavior and the process of black/white negotiations.     

Testing for inhibitory stimulus control with S- superimposed on S+

Pigeons learned a successive discrimination between a positive stimulus (red) correlated with a variable-interval 1-min reinforcement schedule and a negative stimulus (vertical line) correlated with either a variable-interval 5-min schedule or extinction. Transfer tests measured the rate of responding to the positive stimulus alone, to various orientations of the negative stimulus, and to the same line orientations superimposed on the positive stimulus. Although there were no gradients with minima at the training value for the negative stimulus dimension, the addition of the negative stimulus dimension to the positive stimulus always resulted in a lower response rate than that for the positive stimulus alone. The results demonstrate that an operational definition of inhibitory stimulus control that requires increased responding to stimuli more distant from a negative stimulus (along some dimension) is not always consistent with a definition that requires the suppression of responding in the presence of one stimulus, the positive stimulus, by the simultaneous presentation of another, the negative stimulus.     

Adolescent pregnancy and infant mortality: isolating the effects of race

Researchers continue to accept the untested assumption that the difference between black and white infant mortality rates is largely attributable to race-linked differences in teenage pregnancies (Wise, 1984). The basic notion is that the inordinately high black teenage pregnancy rate (because of its association with low birth weight births) accounts for this difference. This paper tests this key assumption directly and finds only partial support for it. It then argues that the key to the black-white difference in infant mortality is poverty, not teenage pregnancy. Using data from the state of North Carolina, the results suggest that poverty, not race, plays the crucial role in infant mortality.     

Social factors influence haloperidol-induced catalepsy in rat

This study employed manipulations which presumably influence social interactions in rats: (1) paired housing with a heavier conspecific and (2) exposure to the odors of other rats. The dependent variable was the akinetic state induced by haloperidol, a neuroleptic and dopamine antagonist. In Experiment 1, adult male Long-Evans hooded rats were matched by weight and caged alone or in pairs with one rat 30 g heavier than its cagemate. All rats received haloperidol (1.5 mg/kg) and catalepsy testing. Heavy rats showed more catalepsy than the lighter member of pairs or weight-matched, singly housed controls. In Experiment 2, adult male rats were left unrecaged or were recaged into cages with bedding recently soiled by females or other adult males. After haloperidol (1.0 mg/kg), the rats exposed to bedding soiled by other adult males showed more catalepsy than did the control groups. Thus, the results of both experiments indicated that social factors can influence the akinesia induced by dopamine antagonists.     

Responses to collective risk: Appraisal and coping among workers exposed to occupational health hazards

Appraisals of occupational health risks and coping alternatives were examined in a study of 670 steelworkers. Three forms of coping were considered: emotion focused, problem focused, and system oriented. Path analysis was used to test a model of coping as a function of primary appraisals of occupational exposures, secondary appraisals of coping options, reappraisal of health concerns, and background characteristics. Results show that each element in the proposed model contributes significantly to all three coping types. In addition, distinctive patterns of secondary appraisal were observed for each type of coping. Future use of the concept of system-oriented coping is suggested for investigating problems not easily solved by individual action.     

Behaviorism: Are reports of its death exaggerated?

Despite reports that behaviorism is dead or dying, examination of the data indicates otherwise. The opinions of psychology historians, the number of professional associations devoted to behaviorism, and the increasing number of behavioral publications all support the conclusion that behaviorism is vital and growing.     

Newborns' discrimination of chromatic from achromatic stimuli

Two experiments assessed newborns' ability to discriminate chromatic from achromatic stimuli. In Experiment 1, newborns differentiated gray from green, from yellow, and from red: For each of these hues they preferred chromatic-and-gray checkerboards over gray squares matched in mean luminance, even though the luminance of the gray checks was varied systematically over a wide range so as to minimize nonchromatic cues. However, newborns showed no evidence of differentiating gray from blue: At some luminances they showed no preference for a blue-and-gray checkerboard over a gray square. In Experiment 2, newborns differentiated red from gray but appeared not to differentiate blue from gray: Following habituation to a series of gray squares of varying luminance, they looked longer at a red square than at a gray square of novel luminance but showed no such pattern of recovery to a blue square. The results imply that newborns have some, albeit limited, ability to discriminate chromatic from achromatic stimuli and hence, that they are at least dichromats.