Background. Teacher’s perceptions of Self-efficacy (SE) have been suggested as an important factor in the
successful inclusion of students with special educational needs. The purposes of this study were (a) to investigate the
validity and reliability of the instrument of physical education teachers’ self-efficacy toward the inclusion of students
with Autism Spectrum Disorders (PESEISD-A), using a Lithuanian physical education (PE) teachers’ sample, and
(b) to assess relationships between SE scale and subscales.
Methods. The English version of the instrument was translated into Lithuanian using the back-translation
technique. The participants were 368 PE teachers working in Lithuanian schools (152 males and 216 females),
aged between 24 and 65 years (M = 47.09; SD = 9.06). The content and construct validity of the instrument were
supported.
Results. The results of the factor analysis indicated a one-factor solution for the scale’s SE. Cronbach’s alpha
reliability of SE scale and all other subscales was high (α > .93). Test-retest correlation analysis showed a satisfactory
coefficient. In this study, positive and significant relationships between SE scale, mastery experience, vicarious
experience, social persuasion, physiological state, behaviour, and perceived challenges subscales were determined
(p < .01).
Conclusions. The Lithuanian version of the PESEISD-A appears to be a valid and reliable instrument, enabling
future research on Lithuanian PE teachers.