Development and validation of an astronomy self-efficacy instrument for understanding and doing

TL;DR

This paper introduces and validates a new astronomy self-efficacy instrument with two factors, demonstrating high reliability and construct validity, to assess confidence in learning astronomy content and using astronomical instruments.

Contribution

The paper develops and validates a reliable, astronomy-specific self-efficacy instrument with two distinct factors, advancing tools for evaluating science identity in astronomy.

Findings

High reliability with Cronbach's alpha above 0.9 for both factors

Both scales demonstrated high construct validity

Instrument is suitable for assessing astronomy self-efficacy

Abstract

This paper presents a new astronomy self efficacy instrument, composed of two factors, one relating to learning astronomy content, which we call astronomy personal self efficacy, and the other relating to the use of astronomical instrumentation, specifically the use of remote robotic telescopes for data collection. The latter is referred to as the astronomy instrumental self efficacy factor. The instrument has been tested for reliability and construct validity. Reliability testing showed that factor 1 had a Cronbachs alpha of 0.901 and factor 2 had a Cronbachs alpha of 0.937. Construct validity was established by computing one way analyses of variances, with the p value suitably protected, using independent variables peripherally related to the constructs. These analyses demonstrate that both scales possess high construct validity. The development of this astronomy specific instrument is an important step in evaluating self efficacy as a precursor to investigating the construct of science identity in the field of astronomy.