Background: This research was conducted to objectively evaluate the
level of brain fog that may develop due to many reasons. Methods: This
was a methodological study. This study was conducted between April and
May 2021 in Turkey. Content validity ratio, Exploratory Factor Analysis,
Confirmatory Factor Analysis, Kaiser-Meyer-Olkin analysis and Bartlett’s
test of sphericity, Item analysis, Cronbach’s alpha coefficient,
Spearman-Brown, Guttman Analysis and test-retest correlations
validity-reliability analysis were performed. The statistical
meaningfulness level in all tests was determined as p<0.05.
Results: As a result of context validity, factor analysis and item
analysis, a 30 item scale with 3 subscale was obtained. In the scale,
the variance amount explained by the three sub components was on a very
good level (77.43%). The fact that all of the Cronbach alpha,
Spearman-Brown and Guttman internal consistency coefficients of the
scale and all of its subscale are above 0.70. When the test retest
reliability coefficients of the scale was examined, the scale was found
to present consistent results in different applications and the scale
was found to be reliable with regard to the constancy coefficient.
Conclusion: The Brain Fog Scale consists of 30 items and three
subscales. It is a valid and reliable instrument that is appropriate for
Turkish society. It can be used to determine the level of brain fog in
the last 30 days.