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| The IDI was initially developed in the United States by Richard E. Zackrison, Ph.D.
and is based heavily on research conducted by Dr. David W. Merrill and Dr. James Taylor . One of the
primary purposes of Merrill and Taylor’s original research was to investigate the relationship between
human behavioural or ”social” styles and effectiveness as a manager.
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The IDI measures and describes three dimensions of an individual’s interpersonal behavior.
The first dimension, ”directiveness”, is assessed on a scale from ”seldom” to ”often” and is a measure of
the degree to which an individual is perceived as striving to influence or have control over others.
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An IDI-profiling packet consists of a self-assessment instrument and six assessment forms
to be completed by Individuals chosen by the person to be profiled. All forms are completed via the
internet and returned confidentially to Effectiveness Consultants.
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The IDI was first developed in 1976 and today we have approximately 270 licensed IDI-facilitators
in Europe using the instrument in many different organisations all over the world. Read
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