In our study, in order to assess the RIPLS and IEPS characteristics to
be relatively stable over time, test–retest reliability was employed. In
doing so, these instruments were given to a single group of 30 subjects
(nursing, medical and science in surgical technology students) under
standardized conditions. The second administration occurred 2 weeks
after the first. It should be noted that no interventions, which might
have affected the stability of the characteristics being measured, were
performed between the first and second administrations. Then, the
Pearson correlation coefficient (rxy) was used to determine the extent
to which the two sets of scores were correlated