Item difficulty analysis of the tactual performance test trials

Area of Science:

• Neuropsychology
• Cognitive Psychology
• Rehabilitation Science

Background:

• The Tactual Performance Test (TPT) assesses tactile sensory-perceptual and motor skills.
• Understanding item difficulty is crucial for interpreting TPT performance across different groups.
• Previous research has not fully elucidated difficulty gradients within TPT tasks.

Purpose of the Study:

• To analyze item difficulty in Tactual Performance Test (TPT) trials.
• To investigate performance differences across normal, alcoholic, and heterogeneous groups.
• To identify factors influencing task difficulty within the TPT.

Main Methods:

• Data from 314 participants across three groups (normal, alcoholic, heterogeneous) were analyzed.
• A three-way split-plot analysis of variance was employed.
• Trials included preferred hand, nonpreferred hand, and both hands conditions.

Main Results:

• Three significant two-way interactions were observed: group by trial, group by block, and trial by block.
• These interactions complicated a straightforward interpretation of the data.
• A key finding indicated that blocks positioned at the top of the TPT board presented greater difficulty than those at the bottom.

Conclusions:

• Item difficulty in the Tactual Performance Test is influenced by multiple interacting factors.
• The spatial arrangement of items (top vs. bottom blocks) significantly impacts task difficulty.
• Further research is needed to fully understand the complex interactions affecting TPT performance in clinical and non-clinical populations.