A nonparametric approach for assessing latent trait unidimensionality

Assuming a nonparametric family of item response theory models, a theory-based procedure for testing the hypothesis of unidimensionality of the latent space is proposed. The asymptotic distribution of the test statistic is derived assuming unidimensionality, thereby establishing an asymptotically valid statistical test of the unidimensionality of the latent trait. Based upon a new notion of dimensionality, the test is shown to have asymptotic power 1. A 6300 trial Monte Carlo study using published item parameter estimates of widely used standardized tests indicates conservative adherence to the nominal level of significance and statistical power averaging 81 out of 100 rejections for examinee sample sizes and psychological test lengths often incurred in practice.The referees' comments were remarkably detailed and greatly enhanced the writeup and sensitized the author to certain pertinent issues. Discussions with Fritz Drasgow, Lloyd Humphreys, Dennis Jennings, Brian Junker, Robert Linn, Ratna Nandakumar, and Robin Shealy were also very useful.This research was supported by the Office of Naval Research under grant N00014-84-K-0186; NR 150-533, and by the National Science Foundation under grant DMS 85-03321.     

Alcohol and drug use in stressful times: The influence of the masculine role and sex-related personality attributes

In times of stress, men and women sometimes turn to the use of alcohol and drugs as an avenue for relieving their discomfort and distress. One explanation of this finding implicates traditional male tendencies as predisposing factors. The purpose of the present investigation was to study how the relationship between stress and substance use is moderated (1) by the masculine role, as measured by the Masculine Role Inventory; and (2) by socially desirable and undesirable masculine-instrumental and feminine-expressive personality attributes, as measured by the Extended Personal Attributes Questionnaire. The results indicated that during stressful episodes men characterized by socially undesirable instrumental personality attributes reported using tranquilizers and sedatives. By contrast, it was found that during stressful times, women characterized by success preoccupation reported less use of mind-altering drugs and more use of tranquilizers-sedatives. In addition, it was found that socially desirable expressive attributes served to buffer the impact of stressful experiences on women's use of alcohol.A preliminary report of these data were presented at the 1985 annual meeting of the Southwestern Psychological Association, Austin, Texas. Gratitude is extended to Toni Falbo for her assistance with this research.     

Relation of sex and gender role to love,sexual attitudes,and self-esteem

One theory of love (J. A. Lee, The Colors of Love: An Exploration of the Ways of Loving, Don Mills, Ontario: New Press, 1973) assumes at least six different attitudinal orientations toward love. Based on Lee's approach, recent research (e.g., C. Hendrick & S. Hendrick, “A Theory and Method of Love,” Journal of Personality and Social Psychology, 1986, 50, pp. 392–402) has found consistent sex differences in love attitudes. Other research has found comparable sex differences in sexual permissiveness and other sexual attitudes. The present study explored the possibility that gender role orientation might be related to differences in love and sexual attitudes. A sample of 286 college students completed the Bem Sex Role Inventory (BSRI), Love Attitudes Scale, Sexual Attitudes Scale, and the Rosenberg Self-Esteem Scale. Correlational analyses revealed many significant associations among love and sexual attitudes, self-esteem, and masculinity and femininity. Subjects were also classified according to gender role as androgynous, masculine, feminine, or undifferentiated, according to BSRI scores. Analyses of variance showed effects for both sex of subjects and gender role orientation on several of the dependent measures. The pattern of the results suggested that sex-stereotyped couples may have difficulties in romantic relationships because of the discrepancies in their love and sexual attitudes. An argument was made in support of the recent trend toward a multidimensional concept of gender role orientation.     

The impact of pre-employment integrity testing on employee turnover and inventory shrinkage losses

A major home improvement chain located primarily in the western United States initiated the use of thePersonnel Selection Inventory, a written integrity test, as part of its pre-employment hiring process. For two years only, those job applicants who passed this test and other pre-employment criteria were hired by the chain. Following the introduction of the inventory, there was: (1) a 50% reduction in the number of employee terminations for theft, illegal drug use, and violence over a five year period and (2) a savings in shrinkage losses that amounted to over two million dollars over a two year period.     

Ineffability and intelligibility: Towards an understanding of the radical unlikeness of religious experience

Conclusion I do not for a moment question the fact that many people have experiences of a special type which may be termed religious, that such experiences often involve reference to something which appears to display a radical unlikeness to all else and that they are therefore in some sense inexpressible. Doubtless the ideas I have put forward about the possible source of such unlikeness and ineffability might suggest models of God which would not find much theological approval, at least within any mainstream theistic tradition, since some sort of pantheism seems inevitably to be implied. But however this might be, the concept of radical unlikeness as it has been analyzed here can, I think, help us towards understanding certain problematic areas in religion quite apart from the issue of intelligibility, which has been the focus of this discussion.To begin with, radical unlikeness suggests a way in which the historical continuity of concepts of the transcendent might be upheld against the discontinuity suggested by the diversity of interpretations through which they have moved. Ancient and modern outlooks on, say, God differ enormously, as indeed do the range of co-temporal accounts at many particular moments. But, by and large, theologians firmly maintain that it is a single and unchanging phenomenon which is being dealt with. Unless we can point to some common element which is both specific enough to create a binding sense of common tradition, yet never completely expressed by any attempt at understanding it within that tradition (thus persistently demanding new attempts to apprehend it), then given the widely differing views of God within, for example, the Christian community, it is difficult to see how we could assume that in fact they all stemmed from the same source and were talking about the same thing. The idea of radical unlikeness could provide an element with just these required characteristics: it could be seen as what all the accounts attempt to net, with varying degrees of adequacy, within their offered interpretations. It could be seen as what remains constant, constantly elusive yet constantly generative of fresh attempts to apprehend it, throughout a history of intra-religious diversity. Secondly, radical unlikeness might suggest a possible way of understanding inter-religious diversity in a way which allows that whilst such diversity exists, whilst the differences between religions are real, they are grounded in a similar root-experience. It may, at first sight, seem difficult to continue thinking of the various religious traditions as truly separate phenomena if they are taken as being grounded on experiences whose ineffability stems from the unlikeness of experiencing things as a whole. Here we must stress again that if they are to be considered intelligible, radically unlike experiences cannot be considered completely so - or putting this another way, we cannot more than approach experience of totality. Sense can be given to religious claims of ineffability by suggesting experience of near totality, where we reach the last point on the scale of inclusiveness which complies with the logical criteria demanded of something for it to be possible for us to be aware of it. We might thus attempt an explanation of inter-religious diversity based on the view that Hinduism, Buddhism, Christianity, Islam etc. acquire their differences from the different elements included in their experience of near totality. Taking totality to be represented by the scale of one to ten, Hinduism might be seen as grounded on experience of 1-2-3-4-5-6-7-9-10, Buddhism on experience of 1-3-4-5-6-7-8-9-10 and so on. The resulting dissimilarities are thus centred not on different types of experience, but on different areas of inclusiveness. This is, of course, to suppose that the various religious traditions are all based on the same degree (as opposed to the same elements) of inclusiveness, but it is by no means clear that such a supposition is justified. Continuing with our decimal analogy, might it not be suggested that whilst Christianity stemmed from experience of 2-3-4-5-6-7-8-9-10, Jainism was founded on a less extensive encounter with the divine (say 4-5-6-7-8-9-10)? It is, however, uncertain how we can compare and evaluate different religious traditions in such a way as to be able to comment on such claims. The analysis of radical unlikeness and ineffability which has been advanced might also suggest a way in which certain passages in religious writings could be understood, passages which at first sight can be seriously perplexing. If, for example, to return to the quotation given in the introductory section of this paper, we continue to think of accounts of the nature of Shiva as being attempts to describe some discrete, objective entity, then it is inevitable that either we will share the Puranic writer's puzzlement or that much of what we read about Shiva will appear as the muddled and extravagant thinking thrown up by an uncritical and over-fertile mythological imagination, consisting of little more than a hotch-potch of contradictory elements. But if we see such accounts as attempting to say something about everything, as symbols of near totality stemming from experiences which verge on the holistic, then what we read - with all its ambiguities - may become somewhat more meaningful. This analysis of ineffability and intelligibility seeks to introduce for debate a possible way of understanding the radical unlikeness which accounts of religious experience apparently attempt to speak about. It does not, however, claim to present an exhaustive treatment of the issues raised, on the contrary, I am conscious of many shortcomings and omissions. For instance, it remains to be seen under precisely what conditions something counts as being an elucidating likeness (presumably all experiences are, for example, temporal, yet temporality alone would not seem to offer a particularly elucidating comparison). Moreover, the degree to which appeal to likeness is allowed operation in actual accounts of religious experience needs to be explored. In addition, the notion of categorizing experiences according to the extent to which they approach a point of total inclusion requires careful clarification. To begin with, according to what criteria could we establish that one experience was more inclusive than another? However, such issues can only be mentioned here, any adequate consideration of them would require a separate paper.In conclusion, I would suggest that to use radical unlikeness and/or ineffability simply as devices by which to halt any process of investigation, proclaiming that the thing in question is not like anything and so is beyond all words, risks making unintelligible and placing beyond all further inquiry an important and extensive area of human experience. As William Alston put it, to label something ineffable in an unqualified way is to shirk the job of making explicit the ways in which it can be talked about. It is surely more accurate to take ineffability as a qualifier which multiplies models without end than as an absolute which prevents the construction of any elucidating models.An early draft of this paper was read to a seminar group at the University of St. Andrews during Martinmas term 1984. I am grateful to Dr. Gordon Graham & Mr. Tony Ellis, both of the Department of Moral Philosophy, and to Dr. George Hall, of the Department of Divinity, for remarks which stimulated some subsequent revisions of the argument.

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Self-Control: Essence and Development

The paper surveys practical knowledge about the act of self-control, particularly how to cultivate it. The discussion is organized around four totally interrelated components: awareness, intervention, sense of self, and sense of will.

     

Behavioral assessment of methylphenidate in a child with frontal lobe damage

The assessment and management of inattentive, hyperactive, and impulsive behavior in a 6-year-old girl who experienced frontal lobe damage are described. A multimodel approach combining medical, educational, and behavioral techniques to assess hyperactive behavior, optimal medication level, and medication and psychotherapeutic effectiveness is described. The results of the study suggest that in similar cases, children and adolescents manifesting these behaviors should be given a trial of stimulant medication in a controlled environment to assess if such therapy is indicated. Additional support is given for the increasing need for detanté and cooperation with health-care professionals.     

Spontaneous alternation behavior in animals: A review

Factors affecting spontaneous alternation behavior (SAB) in animals, for example, age, gender and species studied; type of apparatus and cues employed; and neuro-anatomical, neuro-chemical and motivational status of the organism, were reviewed. Despite a myriad of experiments showing interesting main effects of such variables, little research has been performed assessing the interactive affects of these factors on alternation behavior. For example, psychologists test rats in central nervous system (CNS) lesion studies, whereas psychopharmacologists tend to assess SAB in mice. Most importantly, studies have not been reported investigating the possible interactions among species, brain lesions and drugs. This is an unfortunate omission since several important alternation models include propositions relating to cholinergic and/or serotonergic coding in the hippocampus. Examination of behavioral studies revealed the primary cue for alternation among invertebrates to be body turn, whereas vertebrates rely primarily on directional and odor cues. Reference to the seeking of stimulus change remains the most compelling motivational account of why animals manifest this ubiquitious and reliable behavior pattern. This review and the unpublished studies were supported by Research Grants MH16962, MH21288, and MH36491 from the National Institute of Mental Health and the Wake Forest University Research and Publication Fund.