An expert–novice comparison of feature choice

Perceptual experts have learned to rapidly and accurately perceive the structural regularities that define categories and identities within a domain. They extract important features and their relations more efficiently than novices. We used fingerprint examination to investigate expert–novice differences in feature choice. On each fingerprint within our set, experts and novices selected one feature they thought was most useful for distinguishing a particular print and one feature they thought was least useful. We found that experts and novices often differed in the features they chose, and experts tended to agree more with each other. However, any such expert–novice difference appeared to depend on the image at hand typically emerging when salient or more conspicuous features of a fingerprint were unclear. We suggest that perceptual training ought to direct attention to useful features with the understanding that what is useful may change depending on the clarity of the stimuli.     

Ego atrophy in addiction illustrated through American cultural music folklore

Popular music is an artifact of folklore that can provide a keen insight into societal complexity. As a window with minimal censorship, it allows access to a subgroup whose motifs are often obfuscated from within and without by defensive and self righteous distortions. Music is a primary source depicting the strivings and failings of a culture or its tributaries. An overview is offered of the American social historical context of substance abuse, as it informs the theory of ego atrophy to conceptualize addiction. In this study, it is appealed to as an aid in the elaboration of addictive behavior. Adjunctively, major themes in movie pictures are referenced as parallel, albeit less refined, indices of stereotype in the culture. Together with societal laws and mores, these markers point to a specific behavioral and value system that typifies the ego of the substance abuser.     

Personality Correlates of Self-Esteem

The current study examined the relation between self-esteem and the Big Five personality dimensions. Data were collected over the Internet from a large heterogeneous sample of individuals who ranged in age from 9 to 90 years (N = 326,641). Collectively, the Big Five accounted for 34% of the variance in self-esteem. High self-esteem individuals were emotionally stable, extraverted, and conscientious and were somewhat agreeable and open to experience. Despite an extensive search for potential mediators and moderators of this general pattern, the relations between self-esteem and the Big Five largely cut across age, sex, social class, ethnicity, and nationality (United States vs non-United States). High self-esteem individuals tended to ascribe socially desirable traits to themselves, and this tendency partially mediated relations between the Big Five and self-esteem. Discussion focuses on interpreting the social desirability effects, limitations of the study, and directions for future research.     

Reliability coefficients in a correlation matrix

Givens fallible testst ₁,t ₂, ?t _s , the problem is to express their intercorrelations in terms of the average correlations between a varying number of parallel forms contained within each test. A new correlation determinant Δ′ is derived containingd _ii instead of unity as an element on the principal diagonal, where

$$d_{ii} = [1 + (m_i - 1)\bar r_{ii} ]/m_i ,$$     

Natural Disaster and Depression: A Prospective Investigation of Reactions to the 1993 Midwest Floods

A statewide sample of 1735 Iowa residents, approximately half of whom were victims of the 1993 Midwest Floods, participated in interviews 1 year prior to, and 30 to 90 days after, the disaster. Employing a rigorous methodology including both control-group comparisons and predisaster assessments, we performed a systematic evaluation of the disaster's impact. Overall, the disaster led to true but small rises in depressive symptoms and diagnoses 60–90 days postflood. The disaster–psychopathology effect was not moderated by predisaster depressive symptoms or diagnostically defined depression; rather, predisaster symptoms and diagnoses uniquely contributed to increases in postdisaster distress. However, increases in symptoms as a function of flood impact were slightly greater among respondents with the lowest incomes and among residents living in small rural communities, as opposed to on farms or in cities. Implications for individual- and community-level disaster response are discussed.     

The Experimental Analysis of Human Behavior: History,Current Status,and Future Directions

The Psychological Record - These papers were presented at a symposium held at the 93rd annual convention of the American Psychological Association, August, 1985, Los Angeles, CA. The papers, in...     

Red herring detectors and speech perception: In defense of selective adaptation

The selective adaptation paradigm was used extensively for about 5 years following its introduction to speech research in 1973. During the next few years, its use dropped dramatically; it is now little used. Several reasons for the abandonment of the paradigm are discussed, and theoretical and empirical justification is provided for rejecting these reasons. Experiment 1 demonstrates that “acoustic similarity” of an adapting sound and test items cannot account for the observed results. Experiments 2–4 demonstrate that adaptation effects are not equivalent to simple contrast effects. These experiments indicate that selective adaptation produces robust reaction time effects—items in the adapted category are identified more slowly than unadapted items. The effects found in a simple paired-contrast procedure differ from those found with selective adaptation. Most strikingly, contrast effects are extremely ear dependent—much larger effects occur if testing is conducted in the right ear than in the left; adaptation effects are relatively symmetrical with respect to ear. The empirical and theoretical analyses suggest that the selective adaptation paradigm can be a powerful tool for investigating the perception of complex acoustic stimuli like speech.