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A factor analysis of the items of the imaginal processes inventory
Author(s) -
Giambra Leonard M.
Publication year - 1980
Publication title -
journal of clinical psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.124
H-Index - 119
eISSN - 1097-4679
pISSN - 0021-9762
DOI - 10.1002/jclp.6120360203
Subject(s) - varimax rotation , principal component analysis , psychology , factor (programming language) , factor analysis , sample (material) , test (biology) , statistics , developmental psychology , psychometrics , mathematics , cronbach's alpha , computer science , chemistry , programming language , paleontology , biology , chromatography
Over the last several years, responses to the Imaginal Processes Inventory (IPI) developed by Singer and Antrobus have been collected on over 1300 men and women from age 17 to 92 years. The IPI contains items that concern various aspects of daydreaming and attentional processes. The 344 items of the Imaginal Processes Inventory plus age were intercorrelated for the 1300 S sample. This intercorrelation matrix was subjected to a principal components analysis; 53 principal components then were rotated to a Varimax solution. The Varimax solution was transformed, which led to item coefficients that permit the calculation of factor scores for each S on each of the factorially pure components of the Imaginal Processes Inventory. Results of the factor analysis are given in terms of the meaningfully interpreted components. Also presented are mean factor scores for men and women for 12 age groups.