Cronbach's Alpha Reliability Test
It is common to see the reliability of instruments used in published science education studies framed in terms of a statistic known as Cronbachs alpha Cronbach 1951Cronbachs alpha has been described as one of the most important and pervasive statistics in research involving test construction and use Cortina 1993 p98 to the extent. Below for conceptual purposes we show the formula for the Cronbachs alpha. Cronbach S Alpha Spss Part 2 Cronbach S Alpha Alpha Grad School It also includes the sample size calculator for animal study. . Reliability can be assessed with the test-retest method alternative form method internal consistency method the split-halves method and inter-rater reliability. New features will be added over time. With an increase in correlation between the items the value of Cronbachs Alpha increases and therefore in psychological. 20 KR-20 and split-half methods can also be employed for estimating internal con...