Description

The Stroop Neuropsychological Screening Test (SNST-112) is a neuropsychological assessment used to evaluate executive functioning, selective attention, and the ability to manage conflicting information. According to the provided material, it may also be used in the assessment of cognitive difficulties and in populations with brain lesions or psychiatric disorders.

The test is based on the well-known Stroop effect, in which performance becomes more difficult when the meaning of a word conflicts with the color in which it is printed. The requirement to ignore the automatic reading response and focus instead on the ink color engages inhibitory control, selective attention, and broader executive processes.

Aim

The primary aim of the SNST-112 is to assess cognitive control and the ability to inhibit automatic responses.

Performance on the test may provide information about:

Selective Attention: the ability to focus on relevant information while ignoring competing stimuli.

Inhibitory Control: the capacity to suppress a dominant or automatic response.

Executive Functioning: the ability to manage conflicting information efficiently.

Processing Speed and Accuracy: the speed of responding and the number of errors made during task performance.

Test Structure and Procedure

The original Stroop task was introduced by John Ridley Stroop in 1935, while a major review of the Stroop effect was later published by MacLeod.

The provided material describes two basic testing conditions. Participants are required to respond to stimuli in which the meaning of a color word and its actual ink color may be incongruent. For example, the word “RED” may be printed in blue ink.

The critical requirement is to ignore the semantic meaning of the word and respond according to the actual ink color. This conflict produces Stroop interference and allows assessment of the efficiency of cognitive control.

Scoring

Unlike many self-report psychometric scales, the Stroop test does not rely primarily on Likert-type ratings. Performance is assessed through objective indicators such as:

Response Time: the time required to complete each condition.

Number of Errors: incorrect responses made during the task.

Delays: increased response times when conflicting information is presented.

Interference Effect: the difference in performance between simpler and more demanding conditions.

According to the provided material, scoring is based on differences in completion time between conditions, together with the number of errors or delays.

Data Analysis and Use

SNST-112 data may be analyzed by comparing response times and error rates.

In research settings, statistical techniques such as t-tests or analysis of variance (ANOVA) may be used to compare performance across different groups or experimental conditions.

Researchers may also examine associations between Stroop performance and other cognitive or psychological variables in order to explore how inhibitory control and attention relate to broader cognitive functioning.

Psychometric Characteristics

The provided material reports high validity of the test for assessing executive functioning and indicates test-retest reliability greater than 0.85.

These values should be interpreted in relation to the specific Stroop version used, the population assessed, the administration procedure, and the relevant manual or protocol.

Applications

The SNST-112 may be used in neuropsychological and cognitive assessment, as well as in research on attention, inhibitory control, and executive functioning.

It may also be applied in comparisons between clinical and non-clinical populations or in studies examining factors that influence cognitive speed and interference control.

Interpretation of results should take into account variables such as age, educational background, language ability, and administration conditions.

References

Stroop, J. R. (1935). Studies of interference in serial verbal reactions. Journal of Experimental Psychology, 18(6), 643–662.

MacLeod, C. M. (1991). The Stroop test: A review. Psychological Bulletin, 109(2), 163–203.

Smith, A. (2020). Cognitive assessment tools: A meta-analysis. Journal of Neuropsychology, 15(3), 210–225.

Papadopoulos, G. (2019). Neuropsychological Tests in Greece. Athens: Psychology Publications.