Date of Award

Spring 5-17-2019

Degree Type


Degree Name

Doctor of Philosophy (PhD)


Counseling and Psychological Services

First Advisor

Dr. Jeffrey S. Ashby

Second Advisor

Dr. Kenneth G. Rice

Third Advisor

Dr. Cirleen DeBlaere

Fourth Advisor

Dr. Ruperto (Toti) Perez



Psychological inflexibility and perfectionism have garnered a great deal of interest as having significant influence on mental health (e.g., Kashdan & Rottenberg, 2010; Curran & Hill, 2017). A number of researchers have examined the connection between perfectionism and psychological flexibility (e.g., Moroz & Dunkley, 2015; Santanello & Gardner, 2007) and suggested that processes involved in psychological flexibility may be important in understanding perfectionism. The current study was developed to further investigate the relationship between perfectionism and the processes of psychological flexibility and psychological inflexibility. The sample included 833 participants recruited from college and university counseling centers and university undergraduate courses, with 535 recruited from the undergraduate courses and 298 recruited from university counseling centers. Measurement invariance tests supported the two-factor structure of the Short Almost Perfect Scale and the Frost Multidimensional Perfectionism Scale – Brief, as well as the six-factor structure of psychological flexibility and psychological in flexibility of the Multidimensional Psychological Flexibility Inventory. The results of a Latent Profile Analyses (LPA) offered support for a four-class model of perfectionism based on factors derived from the two perfectionism measures. Auxiliary analyses revealed variable levels of psychological flexibility and inflexibility among perfectionism-related latent classes with adaptive perfectionism classes having higher levels of psychological flexibility and lower levels of psychological inflexibility than maladaptive perfectionism classes.