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In statistics, (between-) study heterogeneity is a phenomenon that commonly occurs when attempting to undertake a meta-analysis. In a simplistic scenario, studies whose results are to be combined in the meta-analysis would all be undertaken in the same way and to the same experimental protocols.
For example, considerations of homoscedasticity examine how much the variability of data-values changes throughout a dataset. However, questions of homogeneity apply to all aspects of the statistical distributions, including the location parameter. Thus, a more detailed study would examine changes to the whole of the marginal distribution.
Observational study, can be naturalistic (see natural experiment), participant or controlled. Program evaluation; Quasi-experiment; Self-report inventory; Survey, often with a random sample (see survey sampling) Twin study; Research designs vary according to the period(s) of time over which data are collected:
However, in an intragroup context the perceiver may be motivated to attend to differences with the group (between "me" and "others in the group") leading to perceptions of comparative ingroup heterogeneity. As perceivers are less often motivated to perform intra-group outgroup comparison, this leads to an overall outgroup homogeneity effect.
A number of published studies have also argued against the existence of a general factor of personality. [26] [27] [28] For example, Muncer [26] critiqued the study by Rushton and Irwing [16] that had claimed to find a general factor of personality based on a new analysis of Digman's data. Muncer argued that Rushton and Irwing's meta-analysis ...
Advanced Placement (AP) Psychology (also known as AP Psych) and its corresponding exam are part of the College Board's Advanced Placement Program. This course is tailored for students interested in the field of psychology and as an opportunity to earn Advanced Placement credit or exemption from a college -level psychology course.
Homogeneity and heterogeneity; only ' b ' is homogeneous Homogeneity and heterogeneity are concepts relating to the uniformity of a substance, process or image.A homogeneous feature is uniform in composition or character (i.e., color, shape, size, weight, height, distribution, texture, language, income, disease, temperature, radioactivity, architectural design, etc.); one that is heterogeneous ...
A 2009 study in developmental psychology examined non-cognitive traits including blood parameters and birth weight as well as certain cognitive traits, and concluded that "greater intrasex phenotype variability in males than in females is a fundamental aspect of the gender differences in humans".