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The present study was designed to provide empirical evidence for an assumed order sequence of five behavioral strategies in 75 severely and profoundly retarded adults. A behavioral strategy was defined as a set of task-related behaviors each of which is controlled by the same stimulus properties of the materials. Four sets of tasks were used to measure four of the five strategies. Multiple presentation modes were employed to enhance the Ss' understanding of the demand characteristics of the tasks. A scalogram analysis revealed that the four sets of items met the requirements for a cumulative scale. Additional analyses were performed to identify individual items measuring a specific behavioral strategy. The obtained results indicated that most items measured one strategy although not always the one for which they were designed. The additional value of the described classification system over other, more traditional measures, is discussed.
P M Smeets, and
J J ter Laak, and
J C Jansen, and
A Hakker
December 1968,
Hospital & community psychiatry,
P M Smeets, and
J J ter Laak, and
J C Jansen, and
A Hakker
June 1985,
American journal of medical genetics,
P M Smeets, and
J J ter Laak, and
J C Jansen, and
A Hakker
November 1969,
The Training school bulletin,
P M Smeets, and
J J ter Laak, and
J C Jansen, and
A Hakker
January 1972,
Hospital & community psychiatry,
P M Smeets, and
J J ter Laak, and
J C Jansen, and
A Hakker
February 1985,
Psychological reports,
P M Smeets, and
J J ter Laak, and
J C Jansen, and
A Hakker
October 1980,
Electroencephalography and clinical neurophysiology,
P M Smeets, and
J J ter Laak, and
J C Jansen, and
A Hakker
November 1971,
American journal of mental deficiency,
P M Smeets, and
J J ter Laak, and
J C Jansen, and
A Hakker
August 1978,
Psychological medicine,
P M Smeets, and
J J ter Laak, and
J C Jansen, and
A Hakker
March 1989,
The Journal of genetic psychology,
P M Smeets, and
J J ter Laak, and
J C Jansen, and
A Hakker
August 1967,
Mental retardation,
