PPIK - What does PPIK stand for? The Free Dictionary
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The overall results impressively bolster Ackerman's (1996) PPIK theory, as indicated by excellent fit indices.
The path model tested in this study allows a partial test of Ackerman's PPIK theory and our hypothesis about the major role of deep thinking (reasoning) compared to mental processing speed (Figure 5 shows the results).
Ackerman (1996) has proposed the PPIK (intelligence-as-Process, Personality, Interests and intelligence-as-Knowledge) theory of intelligence.
Therefore, there is some support for Hypothesis 4 and the PPIK theory.