Active Minds: Changing the Conversation About Mental Health



The science concerned with evaluating the attributes of psychological tests Relevant to all aspects of psychology- research and practice There are two major attributes of psychological tests- reliability and [...]


Differences in correlations


Variance: Represents the amount of variability in the data Three main methods of representing variability o Range (smallest and largest data points) o Standard deviation o Variance Correlation: Standardised [...]

Differences in correlations2019-05-25T23:54:19-04:00

Item types


Rating scales: Most widely used response format, respondents provide ratings indicating how strongly they feel positively or negatively on n issue Likert scales use words to anchor the numerical [...]

Item types2018-09-18T18:57:53-04:00



Is pertinent to the consistency of measurement There are various types of reliability, all of which are estimated quantitatively Most basic way to understand the concept is through repeated [...]


Reliability and empirical estimates


Validity: Represents the degree to which the observed scores from a test actually represent the attribute or construct of interest Reliability doesn’t guarantee validity, but without reliability you have [...]

Reliability and empirical estimates2018-09-18T18:57:52-04:00

Importance of reliability


Cronbach’s Alpha assumptions: 1- That the indicators (items) are essentially tau-equivalent o This implies that each item is an equally strong indicator of the true score scores, but the [...]

Importance of reliability2019-05-25T23:53:25-04:00

Validity – conceptual basis


Validity- defined & described: The degree to which a test measures what it is supposed to measure The most important issue in psychological measurement More formally, the degree to [...]

Validity – conceptual basis2019-05-25T23:52:48-04:00

Factorial validity


Is relevant to determining whether the scores of a measure correspond to the number and nature of dimensions of theorised dimensions that underlie the construct of interest Researchers use [...]

Factorial validity2018-09-18T18:57:50-04:00

Convergent and discriminant validity evidence


Convergent and discriminant evidence: Convergent and discriminant validity reflects the degree to which test scores have the ‘correct’ patterns of associations with other variables The conceptual foundation of a [...]

Convergent and discriminant validity evidence2018-09-18T18:57:49-04:00

Personality Assessment


Individual differences in emotional, interpersonal, experiential, attitudinal and motivational styles Use of personality tests (PT): Research o determine the number/nature of dimensions that makes us unique o Stability of [...]

Personality Assessment2018-09-18T18:57:49-04:00

Test Bias


Biases that systematically obscure or cause differences among groups of respondent test scores unjustifiably It is important that test scores do not discriminate unjustifiability against any particular group In [...]

Test Bias2018-09-18T18:57:48-04:00

Item response theory


Classical test theory: Classical test theory incorporates terms such as ‘observed scores’ and ‘true scores’ There is a substantial emphasis on the description and estimation of the reliability of [...]

Item response theory2018-09-18T18:57:47-04:00

Response biases


Do people’s responses to constructs reflect their levels of honesty and/or integrity? How one might’s desire in how they are seen affect the validity of interpretations of the responses? [...]

Response biases2019-05-25T23:50:56-04:00



Defined- the education of elations and correlates o The ability to detect patterns in stimuli It’s what person does when they don’t know what to do The ability to [...]

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