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término		definición
Relability def 1 empezar lección		whether an instrument can be interpreted consistently across different situations
Relability def 2 empezar lección		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 empezar lección		a person should get the same score on a questionnaire if they complete it at two different measurement occasions
Cronbach’s alpha def 1 empezar lección		the most common measure of scale reliability
Cronbach’s alpha def 2 empezar lección		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 empezar lección		0,7 / 0,8 / in psychology sometimes even 0,5 is ok due to diversity of constructs
Possible values for Cronbach's alpha empezar lección		0 to 1
What high Cronbach 's alpha does not suggest? empezar lección		homogenity of the scale
Relability def 3 empezar lección		consistency of measure
In what way should we interpret Cronbach 's alpha? empezar lección		in terms of high reliability rather than homogenity
When does reliability increase empezar lección		higher sample sizes / wider range of Likert’s scale / higher number of item
split-half reliability empezar lección		Spliting the scale into two randomly selected sets of items. Scale is reliable when achieved scores are mostly similar

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