PS295 Lecture Notes - Lecture 2: Neuron, Psychometrics, Ecological Validity
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Recall that hypotheses involve statements about how 2 characteristics (variables) go together. Also sometimes called factors, dimensions, qualities, attributes. Anything that can take on different values or levels across a set of objects. Must have at least 2 different values or levels; otherwise it is a constant. Physical: height, weight, hair colour, heart rate. Every variable has at least two different levels . The study was conducted in either a hot room or a room at normal temperature . The study included 21 male and 23 female participants. Levels differ in terms of quality or type, not in the amounts of something. Example religious affiliation, political party, marital status. Levels differ in terms on the quantity or amount of something. Can place the levels in order, from less to more. Example degree of religiosity, income level, self-esteem. No meaningful values of the underlying variable in between the levels of the scale. Must be measured in whole units or categories.
