Sample and population score matrices and sample correlation matrices from an arbitrary population correlation matrix

A method for generating sample and population score matrices and sample correlation matrices from a given population correlation matrix is developed. An example giving the desired matrices for a population Guttman simplex correlation matrix is presented.The computations for this paper were done on Illiac, an electronic computer of the Digital Computer Laboratory of the University of Illinois. Mr. S. Hunka assisted in these computations. The final version of this paper was prepared while the senior author was a U. S. Public Health Service Fellow at the Center for Advanced Study in the Behavioral Sciences.     

Abacs for determination of a correlation coefficient corrected for restriction of range

Abacs approximating the product-moment correlation for both explicit and implicit selection are presented. These abacs give accuracy to within .01 of the corresponding analytic estimate.     

A note on the Tryon-Kaiser solution for the communalities

The Tryon-Kaiser solution for the communalities is reviewed. Numerical investigation suggests that the procedure is applicable if and only if the correlation matrix has unique minimum rank communalities. This implies that this approach to the communality problem is not general enough to be of practical use.     

Why does visual working memory ability improve with age: More objects,more feature detail,or both? A registered report

We investigated how visual working memory (WM) develops with age across the early elementary school period (6–7 years), early adolescence (11–13 years), and early adulthood (18–25 years). The work focuses on changes in two parameters: the number of objects retained at least in part, and the amount of feature-detail remembered for such objects. Some evidence suggests that, while infants can remember up to three objects, much like adults, young children only remember around two objects. This curious, nonmonotonic trajectory might be explained by differences in the level of feature-detail required for successful performance in infant versus child/adult memory paradigms. Here, we examined if changes in one of two parameters (the number of objects, and the amount of detail retained for each object) or both of them together can explain the development of visual WM ability as children grow older. To test it, we varied the amount of feature-detail participants need to retain. In the baseline condition, participants saw an array of objects and simply were to indicate whether an object was present in a probed location or not. This phase begun with a titration procedure to adjust each individual's array size to yield about 80% correct. In other conditions, we tested memory of not only location but also additional features of the objects (color, and sometimes also orientation). Our results suggest that capacity growth across ages is expressed by both improved location-memory (whether there was an object in a location) and feature completeness of object representations.     

Continuous assessment of Peter Senge's learning organization model for improving the quality of Christian higher education in Indonesia

This paper briefly discusses Peter Senge's Continuous Assessment Learning Organization Model for Quality Improvement, and describes how it is implemented in improving the quality of education by Christian Religious Colleges in Indonesia. The main conclusion of this paper is that Christian Religious Colleges in Indonesia must develop an organizational culture where continuous assessment for quality improvement is part of everyday practice in schools. To achieve this, it is proposed that schools should become learning communities based on Peter Senge's Learning Organization model. While this paper is not based on research, the main implication is that every school should seek creative ways to implement Peter Senge's Continuous Assessment Learning Organization Model for Quality Improvement according to its culture and spirituality. A second implication is a Christian learning organization should be a prayer-defined organization. Every activity, every decision should be informed by prayer and be done in prayer, seeking the will of God, his approval, and his glory. Prayer should play a key role in any assessment. This conceptual paper is original as it explores the fit of applying Peter Senge's Continuous Assessment Learning Organization Model with seeking the will of God, his approval, and his glory for quality improvement in Christian Religious Colleges in Indonesia.     

Of Marriage and Mathematics: Inferentialism and Social Ontology

Topoi - The semantic inferentialist account of the social institution of semantic meaning can be naturally extended to account for social ontology. I argue here that semantic inferentialism...     

The Effectiveness of a REBT Training Program in Increasing the Performance of High School Students in Mathematics

The efficacy of an REBT-based skill training program on the mathematics performance of disadvantaged black eleventh graders enrolled in Upward Bound was examined. Fifty-six students (18 males and 37 females) were randomly assigned to Perception Analysis Training (PAT) or an attention control group (ACG). The two groups met at the same hour each week for eight-weeks. PAT consisted of instruction in the application of RET strategies to the management of emotions that interfere with the development of proficiency in mathematics. ACG group members discussed films pertaining to career and personal development. Pre-test results confirmed a relationship between beliefs and mathematics achievement. Three measures of problematic beliefs concerning mathematics were significantly correlated (p>.01) with high school math grades and performance on the California Achievement Test-Math (CAT). At post-test PAT participants were less committed to self-defeating beliefs regarding mathematics than AGC members. ANCOVAs showed that PAT students made significantly greater pre- to post-test gains in their mathematical performance than control group members. PAT group members out performed AGC subjects in terms of Upward Bound math grades (ES=0.61; p >.0008), high school math grades (ES = 1.09; p>.0001), and scores on the CAT (ES=0.40; p >.02).     

The relation between feelings of knowing and the number of neighboring concepts linked to the test cue

We investigated whether feeling-of-knowing judgments are influenced by the number of different neighboring concepts linked to the test cue in long-term memory as measured using association norms. The purpose was to evaluate contrasting predictions made by the partial-retrieval hypothesis and the competition hypothesis. The partial-retrieval hypothesis assumes the more neighboring concepts activated by the test cue, the higher the feeling of knowing. In contrast, the competition hypothesis assumes that feelings of knowing are sensitive to competition between neighboring concepts, and it predicts that the fewer neighboring concepts activated by the cue, the higher the feeling of knowing. The findings were compatible with the competition hypothesis showing that both feeling-of-knowing and prediction-of-knowing ratings always were higher, the fewer different concepts were linked to the test cue. We obtained an identical pattern of results using different kinds of cues including taxonomic category names, ending sounds, and meaningfully related associates. We consider different ways that these findings could be reconciled with the partial-retrieval hypothesis, and we also discuss implications for other explanations of feeling-of-knowing effects.     

An Examination of Exchange Quality and Work Stressors in Leader–Follower Dyads

This study examined the relationship between quality of leader–member exchange and follower perceptions of work stress. It was proposed that followers in higher quality exchanges were less likely to perceive work stressors than followers in exchanges of lower quality. Data collected from 215 employees of a midsized public university substantially supported this proposition. Quality of leadermember exchange was negatively related to role conflict, role ambiguity, low job scope, lack of career progress, and lack of participation experienced by followers.