An essential textbook for any student or researcher in biology needing to design experiments, sample programs or analyse the resulting data The text begins with a revision of estimation and hypothesis testing methods, covering both classical and Bayesian philosophies, before advancing to the analysis of linear and generalized linear models Topics covered include linear and logistic regression, simple and complex ANOVA models (for factorial, nested, block, split-plot and repeated measures and covariance designs), and log-linear models Multivariate techniques, including classification and ordination, are then introduced Special emphasis is placed on checking assumptions, exploratory data analysis and presentation of results The main analyses are illustrated with many examples from published papers and there is an extensive reference list to both the statistical and biological literature The book is supported by a website that provides all data sets, questions for each chapter and links to software

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Experimental Design and Data Analysis for Biologists

Coefficient alpha (Cronbach, 1951) is certainly one of the most important and pervasive statistics in research involving test construction and use. A review of the Social Sciences Citations Index for the literature from 1966 to 1990 revealed that Cronbach's (1951) article had been cited approximately 60 times per year and in a total of 278 different journals. In addition to the areas of psychology in which one may expect to see alpha used, such as educational, industrial, social, clinical, child, community, and abnormal psychology, this list of journals included representatives from experimental psychology, sociology, statistics, medicine, counseling, nursing, economics, political science, criminology, gerontology, broadcasting, anthropology, and accounting. In spite of its widespread use, however, there is some confusion as to the true meaning and proper interpretation of the statistic. In this article I address this confusion in two ways. First, a theoretical discussion of alpha is presented. This includes some of the many statements that have been made about alpha and an attempt to integrate these statements. Second, I take a more practical approach in which the interpretation of alpha is examined by observing the changes in alpha as the number of items and interitem correlations are manipulated.

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What Is Coefficient Alpha? An Examination of Theory and Applications

https://www.sfs.uni-tuebingen.de/~hbaayen/publications/baayenDavidsonBates.pdf

Mixed-effects modeling with crossed random effects for subjects and items

In recent years, the magnitude, consistency, and stability across time of cognitive sex differences have been questioned. The present study examined these issues in the context of spatial abilities. A meta-analysis of 286 effect sizes from a variety of spatial ability measures was conducted. Effect sizes were partitioned by the specific test used and by a number of variables related to the experimental procedure in order to achieve homogeneity. Results showed that sex differences are significant in several tests but that some intertest differences exist. Partial support was found for the notion that the magnitude of sex differences has decreased in recent years. Finally, it was found that the age of emergence of sex differences depends on the test used. Results are discussed with regard to their implications for the study of sex differences in spatial abilities.

Magnitude of sex differences in spatial abilities: a meta-analysis and consideration of critical variables.

The Effects of Personal and Contextual Characteristics on Creativity: Where Should We Go from Here?

Two correlated factors have been identified in the Psychopathy Checklist (PCL), a valide and reliable instrument for the assessment of psychopathy in male prison populations. Factor 1 measures a selfish, remorseless, and exploitative use of others, and Factor 2 measures a chronically unstable and antisocial life-style. We examined the psychometric properties of the factor solutions and a variety of correlates of the two factors

Two-factor conceptualization of psychopathy: construct validity and assessment implications

https://spectrum.library.concordia.ca/977646/1/The_Vancouver_Obsessional_Compulsive_Inventory.pdf

The Vancouver Obsessional Compulsive Inventory (VOCI).

Clinical depression: comparative efficacy of outpatient treatments.

The earlier two-sample procedure of Feldt [1969] for comparing independent alpha reliability coefficients is extended to the case ofK ≥ 2 independent samples. Details of a normalization of the statistic under consideration are presented, leading to computational procedures for the overallK-group significance test and accompanying multiple comparisons. Results based on computer simulation methods are presented, demonstrating that the procedures control Type I error adequately. The results of a power comparison of the case ofK=2 with Feldt's [1969]F test are also presented. The differences in power were negligible. Some final observations, along with suggestions for further research, are noted.

A k-sample significance test for independent alpha coefficients

Dimensions of Emotional Intelligence (EI) were derived, and their place with respect to the cognitive ability and personality domains was examined. A factor analysis of 24 maximum-performance and self-report EI measures administered to an undergraduate sample (N= 176) yielded five factors: Emotional Congruence, Emotional Independence, Social Perceptiveness, Alexithymia, and Social Confidence. Emotional Congruence had lowcorrelations with four cognitive ability factors and Big Five personality factors, indicating that it may represent either a new psychological construct or a method factor. Social Perceptiveness correlated significantly with cognitive abilities, indicating its place in this domain. The remaining three factors had moderate correlations with various personality dimensions and low correlations with cognitive abilities, indicating that they fall outside the latter domain. On the basis of the present results, only maximum-performance and not self-report measures of EI can be seen as tapping the...

The Nature and Measurement of Emotional Intelligence Abilities: Basic Dimensions and Their Relationships with Other Cognitive Ability and Personality Variables

A. Ralph Hakstian

Papers

Two-factor conceptualization of psychopathy: construct validity and assessment implications

The Vancouver Obsessional Compulsive Inventory (VOCI).

Clinical depression: comparative efficacy of outpatient treatments.

A k-sample significance test for independent alpha coefficients

The Nature and Measurement of Emotional Intelligence Abilities: Basic Dimensions and Their Relationships with Other Cognitive Ability and Personality Variables