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question		réponse
Relability def 1 commencer à apprendre		whether an instrument can be interpreted consistently across different situations
Relability def 2 commencer à apprendre		the ability of the measure to produce the same results under the same conditions. To be valid the instrument must first be reliable
Relability imp 1 commencer à apprendre		a person should get the same score on a questionnaire if they complete it at two different measurement occasions
Cronbach’s alpha def 1 commencer à apprendre		the most common measure of scale reliability
Cronbach’s alpha def 2 commencer à apprendre		equivalent to creating two sets of items in every possible way and computing correlation coefficient for each split
What are acceptable values for Cronbach's alpha commencer à apprendre		0,7 / 0,8 / in psychology sometimes even 0,5 is ok due to diversity of constructs
Possible values for Cronbach's alpha commencer à apprendre		0 to 1
What high Cronbach 's alpha does not suggest? commencer à apprendre		homogenity of the scale
Relability def 3 commencer à apprendre		consistency of measure
In what way should we interpret Cronbach 's alpha? commencer à apprendre		in terms of high reliability rather than homogenity
When does reliability increase commencer à apprendre		higher sample sizes / wider range of Likert’s scale / higher number of item
split-half reliability commencer à apprendre		Spliting the scale into two randomly selected sets of items. Scale is reliable when achieved scores are mostly similar

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