Introduction

In previousresearch methods classes you herad a lot about the importance of relaibility and validity of data and in particular scale data. Reliability refers to the consistency of a measure (over time, accross different researchers and accross items of the scale) This part focusses on Cronbachs alpha - a measurements to test internal consistency accross different items of the scale. Cronbach's alpha can be easily applied in SPSS and should be applied in every research project including scales.