Greek Stroop Test [G-SCWT-300]

Purpose of the Questionnaire (Scale)

The GST (Greek Stroop Test) was designed for the assessment of executive functioning, with an emphasis on the ability to inhibit automated responses and exert cognitive control. It is intended for clinical psychologists, neuropsychologists, and researchers for the diagnosis and monitoring of neurological and psychiatric disorders such as ADHD, schizophrenia, and brain injuries. It measures an individual’s ability to manage cognitive conflicts and control attention.

Questionnaire (Scale) Analysis

The test was developed by Kapsalis and Vlachos (2008) as an adaptation of the classic Stroop Test for the Greek population. It includes three main phases: reading color words (20 items), naming colors (20 items), and the Stroop condition (20 items with color-word conflict). Each phase measures reaction time and number of errors, with special emphasis on the performance differences between phases.

Scoring of Questions

Scoring includes completion time per phase (in seconds), number of errors per phase, Stroop index (difference in time between the 3rd and 2nd phase), and accuracy percentage. Scores are compared with standardized data by age group (10+ years) and educational level.

Statistical Analysis

The test has been standardized on a sample of 1,200 Greeks (ages 10–75 years). Statistical indicators show internal consistency (α = 0.88 for the Stroop condition), test-retest reliability (r = 0.82), and significant correlations (r = 0.65–0.72) with other executive functioning tests.

Validity of the Questionnaire (Scale)

The validity of the GST has been confirmed through correlational studies with other executive functioning tests (r = 0.68–0.75), its discriminative ability between clinical and non-clinical groups, and comparisons with the international version of the Stroop Test.

Reliability of the Questionnaire (Scale)

The tool demonstrates high reliability, with internal consistency (α = 0.85–0.88), repeatability (r = 0.80–0.85 over a 4-week interval), and inter-rater agreement (>90% for result interpretation).

References

Greek References
Kapsalis, P., & Vlachos, F. (2008). The Greek adaptation of the Stroop Test and its application in neuropsychological assessment. Hellenic Journal of Psychology, 15(2), 123–136.
Foreign References
Golden, C. J. (1978). Stroop Color and Word Test: A Manual for Clinical and Experimental Uses. Stoelting.