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10 Cards in this Set
- Front
- Back
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Good research questions have... |
i) question mark ? at end ii) the relevant population iii) constructs being measured iv) relationship b/w constructs v) specify how data will be collected and how it will be analysed |
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Statistical null hypothesis |
researcher wants to nullify the value of an unknown population parameter by applying a significance test |
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3 kinds of research question |
1. Association (correlation/ contingency table) 2. Predictions (regression) 3. Differences (ANOVA/ linear contrasts) |
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Population |
All individuals (N) relevant to the constructs in a research question to whom a psychological theory applies |
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Constructs |
Unobservable human attributes used to explain behaviour/ cognition/affect in theory e.g depression, attention, attitudes, a diagnoses |
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Construct MEASURE |
a method for measuring people on a construct to obtain a construct score - validity - reliability |
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Types of construct scores |
'X' raw score/observed score is a random variable |
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Deviation score |
= X - M where M= mean |
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STANDARDISED / Z- scores |
M = 0, SD = 1 z = X-M/sd |
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Population parameter (we can never know them, but we infer them from calculating sample statistics) |
a single value that specifies a summary characteristic of a population. e.g mean IQ = 100 |
