Reliability of a Shortened Single-Target Implicit Association Test (ST-IAT) as an Implicit Measure of Attitudes towards Inclusion. Replication and Extension of 'Implicitly Measuring Attitudes towards Inclusive Education: A New Attitude Test Based on Single-Target Implicit Associations' (Lüke and Grosche, 2018, European Journal of Special Needs Education)

Attitudes towards inclusion (ATI) are regarded as an important aspect for the implementation of inclusive education. Yet, explicit measures of ATI have some limitations. Single-target implicit association tests (ST-IAT) provide an opportunity to an implicit ATI measure based on differences in reaction times. However, this can be a time-consuming procedure. The present study is a replication and extension of the study 'Implicitly measuring attitudes towards inclusive education: a new attitude test based on single-target implicit associations' by investigating reliability of a shortened version of the ST-IAT Inclusion. Prior studies did not investigate the reliability continuously, nor did they consider different ways of calculating the ST-IAT effect size (D-score). In this study, data from 594 university students are analysed to evaluate the reliability of a shortened ST-IAT Inclusion. Results show that the reliability of the shortened ST-IAT is good and in line with findings on reliability of other ST-IAT procedures. However, the difference between several D-score procedures was rather marginal. Altogether, the shortened ST-IAT Inclusion can provide an economic and reliable measure for ATI.