Rigidity in mentally retarded and nonretarded children

Area of Science:

• Psychology
• Developmental Psychology
• Cognitive Psychology

Background:

• Rigidity is a cognitive style that can be influenced by task difficulty.
• Previous research has explored rigidity in various populations, but its relationship with task difficulty in individuals with mental retardation requires further investigation.

Purpose of the Study:

• To examine the dependence of rigidity on task difficulty in mentally retarded and nonretarded individuals.
• To test the hypothesis that mentally retarded subjects would be more rigid than nonretarded subjects on difficult tasks, but not on easy tasks.

Main Methods:

• Administered an intelligence test and seven rigidity tests of varying difficulty to 45 mentally retarded and 45 MA-matched nonretarded subjects.
• Utilized factor analysis to explore the structure of rigidity within each group.
• Analyzed differences in rigidity scores between groups across easy and difficult tasks.

Main Results:

• Factor analyses revealed one rigidity factor for the retarded group and two for the nonretarded group.
• Rigidity tests demonstrated a Guttman simplex structure in terms of difficulty for both groups.
• No significant differences in rigidity were found on easy tests, but significant differences emerged on more difficult tests.

Conclusions:

• The findings support the hypothesis that mentally retarded individuals exhibit increased rigidity on difficult tasks.
• Results are interpreted within a motivational framework, suggesting that motivational factors play a role in rigidity.
• Rigidity is proposed as an interactional concept with implications for understanding mental retardation.