Instructions and the magnitude of an illusion: Cognitive factors in the frame of reference

Ss judged the length of a horizontal line having vertical lines at the ends and a vertical line crossing at the middle. As has often been shown, judgments of the horizontal line varied inversely with the length of the vertical segments. One group of Ss were told to use the end lines as frame of reference and ignore the center line, and the estimated weights of end and center line were .22 and .02. The other group were told to ignore the end lines and use the center line as frame of reference. The weights of end and center line for this group were .06 and .22. It was concluded that the Helson AI. equations are valid, but that the weights of parts of the field are partly under voluntary control and are not simply a function of the visual field.     

A technique for measuring thermoregulatory behavior in the fish

Apparatus and procedure are described for studying thermoregulatory behavior in fish. Results obtained with rainbow trout suggest that the described apparatus has several advantages over previously utilized devices.     

Invalid results from the method of constant stimuli

The Method of Constant Stimuli was shown to produce constant errors in the direction expected by E. In an experiment, 89 Ss compared variable lines with a standard, each S producing a psychometric function and Point of Subjective Equality (PSE). Four groups differed in the particular range of variable stimuli used; whether the stimuli averaged longer or shorter than the standard, and whether they had a wide or narrow range. All sets of variable stimuli encompassed the standard. PSE was consistently between the standard and the mean of the variables, as predicted by Adaptation Level Theory. In many experiments, the set of variables is chosen on the basis of theory or pilot studies; the present study shows that PSE will be spuriously drawn toward the center of the variables, hence toward E’s pre-experimental expectations.     

Effects of receptive language training on receptive and expressive language development

The effects of a six-month training program in receptive language on receptive and expressive language development were investigated. Developmentally retarded preschoolers were pretested and posttested on one standardized test of receptive language and two tests of expressive language. Both the training and control groups participated in a preschool program. In addition, the training group received a two-sequence training program: (1) reinforcement for matching responses to modeling cues and accompanying verbal requests, and (2) reinforcement for appropriate responses to verbal requests alone. The training group demonstrated a significant increase in appropriate responses to verbal request over base-rate performance after the training and also demonstrated a significantly improved posttest performance on one test of expressive language as compared to the control group.The authors wish to thank Mrs. Helen Huggins and the staff of the Aid to Retarded Children's Preschool Training Center, San Francisco, California, for their assistance in this study. A modified version of this paper was presented at the Gatlinburg Conference on Mental Retardation, March, 1974, Gatlinburg, Tennessee.     

On the determination of redundancies in sociometric chains

The use of a matrix to represent a relationship between the members of a group is well known in sociometry. If this matrix is raised to a certain power, the elements appearing give the total number of connecting paths between each pair of members. In general, some of these paths will be redundant. Methods of finding the number of such redundant paths have been developed for three- and four-step chains by Luce and Perry (3) and Katz (2), respectively. We have derived formulas for the number of redundant paths of five and six steps; and in addition, an algorithm for determining the number of redundant paths of any given length.The research leading to this paper was supported by a grant from the Rockefeller Foundation.     

Jordan und der radikale Pofitivismus:

Ohne Zusammenfassung     

HARKing's Threat to Organizational Research: Evidence From Primary and Meta‐Analytic Sources

We assessed presumed consequences of hypothesizing after results are known (HARKing) by contrasting hypothesized versus nonhypothesized effect sizes among 10 common relations in organizational behavior, human resource management, and industrial and organizational psychology research. In Study 1, we analyzed 247 correlations representing 9 relations with individual performance in 136 articles published in Journal of Applied Psychology and Personnel Psychology and provide evidence that correlations are significantly larger when hypothesized compared to nonhypothesized. In Study 2, we analyzed 281 effect sizes from a meta‐analysis on the job satisfaction–job performance relation and provide evidence that correlations are significantly larger when hypothesized compared to nonhypothesized. In addition, in Study 2, we documented that hypothesized variable pairs are more likely to be mentioned in article titles or abstracts. We also ruled out 13 alternative explanations to the presumed HARKing effect pertaining to methodological (e.g., unreliability, publication year, research setting, research design, measure contextualization, publication source) and substantive (e.g., predictor–performance pair, performance measure, satisfaction measure, occupation, job/task complexity) issues. Our results suggest that HARKing seems to pose a threat to research results, substantive conclusions, and practical applications. We offer recommended solutions to the HARKing threat.