Description

The Short-Term Memory Assessment Test (STMAT-15) is a cognitive assessment instrument designed to evaluate short-term retention and recall of information. It is intended for adults and older adults, particularly individuals showing signs of memory decline.

The instrument focuses on an individual’s ability to temporarily retain information and retrieve it within a short period of time. According to the source material, it may be used by researchers, clinical psychologists, and specialists in cognitive assessment to investigate memory difficulties and to examine the effects of age or interventions on memory performance.

Objective

The main objective of the STMAT-15 is to assess the dynamics of short-term memory, focusing specifically on the ability to maintain and recall information over a limited time interval.

The test may contribute to the assessment of memory functioning and to the examination of possible age-related changes or changes following interventions.

Structure and Subscales

According to the source document, the STMAT-15 was developed by A. Maridaki-Kassotaki in 1998 and consists of 15 tasks assessing the retention and recall of numerical, verbal, and visual information within a restricted time frame.

The instrument is organized into three subscales:

Phonological Retention, including tasks such as the repetition of nonwords.

Visuospatial Retention, including tasks such as recalling visual designs.

Serial Recall, involving the recall of ordered sequences, such as digit sequences.

This multidimensional structure allows different aspects of short-term memory performance to be examined separately.

Scoring

Each correct response is awarded 1 point. The maximum score for each subscale is 5 points, while the maximum total score is 15 points. Higher scores indicate better short-term memory performance.

According to the source material, total scores are interpreted as follows: 0–5 indicates low retention ability, 6–10 moderate retention ability, and 11–15 high retention ability. For the individual subscales, a score of 2 or below is considered weak, whereas a score of 4 or above is considered strong.

Data Analysis and Use

STMAT-15 results may be analyzed using both the total score and the individual subscale scores. Separate examination of the three subscales may help identify different performance patterns in phonological, visuospatial, and serial short-term memory.

In research applications, scores may be compared across age or clinical groups, examined in relation to other cognitive variables, or used in pre- and post-intervention comparisons.

Validity

The source document states that the STMAT-15 demonstrates high validity, supported by associations with established approaches to memory assessment and by related scientific studies, including work by Gathercole and colleagues and Maridaki-Kassotaki.

The source does not provide detailed coefficients or statistical indices for specific forms of validity.

Reliability

According to the source material, the internal consistency of the test is reported as Cronbach’s α = 0.89, while test-retest reliability is reported as r = 0.92.

These values indicate high internal consistency and temporal stability according to the information provided in the original document.

Applications

The STMAT-15 may be used in cognitive assessment, memory research, studies of aging, and the evaluation of short-term memory functioning.

It may also be useful for examining possible changes in short-term memory following cognitive, educational, or other interventions. Its results should be interpreted together with other cognitive and clinical information rather than as a stand-alone diagnostic measure.

References

Maridaki-Kassotaki, A. (1998). Short-term retention ability of phonological information and reading performance. Psychology, 5, 44–52.

Gathercole, S. E., Willis, C. S., Baddeley, A. D., & Emslie, H. (1994). The Children’s Test of Nonword Repetition: A test of phonological working memory. Memory, 2(2), 103–127.

Smith, J. (2021). Advances in Short-Term Memory Assessment. Journal of Cognitive Psychology, 12(3), 45–60.