Factor structure and psychometric properties of the Injection Phobia Scale-Anxiety.

The present investigation examined the factor structure and psychometric properties of the Injection Phobia Scale-Anxiety (IPS-Anx). Principal components analysis of IPS-Anx items in Study 1 (n = 498) revealed a 2-factor structure consisting of Distal Fear and Contact Fear. However, CFA results in Study 2 (n = 567) suggest that a 1-factor structure may be more parsimonious. IPS-Anx scores demonstrated excellent reliability including test-retest over a 12-week period in Study 3 (n = 195). Supportive evidence for convergent and divergent validity of IPS-Anx scores was also found in Study 4 (n = 319), with strong associations with disgust propensity and sensitivity and weak associations with positive affect. Further evidence of validity was found in Study 5 (n = 1,674) because IPS-Anx scores discriminated those who have experienced fainting symptoms or avoided medical procedures from those without a history of such symptoms. In Study 6, data from Studies 2 through 5 were pooled, and the findings of Study 2 were replicated. The 1-factor model also fit the data well for men and women in Study 6. Lastly, IPS-Anx scores differentiated those with blood-injection-injury phobia (n = 39) from those without this phobia (n = 43) in Study 7. These findings suggest that the IPS-Anx has excellent psychometric properties, making it suitable for use in programmatic research on injection phobia. However, future research examining the validity of a short form of the scale with only the Contact Fear items may further improve the efficiency and utility of the IPS-Anx.

[1]  B. Olatunji,et al.  Development and initial validation of an abbreviated Spider Phobia Questionnaire using item response theory. , 2009, Behavior therapy.

[2]  B. Olatunji,et al.  Fear and Disgust Responding to Heterogeneous Blood-Injection-Injury Stimuli: Distinctions from Anxiety Symptoms , 2007 .

[3]  G. Davey,et al.  Disgust propensity and disgust sensitivity: separate constructs that are differentially related to specific fears. , 2006 .

[4]  B. Olatunji,et al.  Can the sex differences in disgust sensitivity account for the sex differences in blood–injection–injury fears? , 2005 .

[5]  Olga V. Demler,et al.  Lifetime prevalence and age-of-onset distributions of DSM-IV disorders in the National Comorbidity Survey Replication. , 2005, Archives of general psychiatry.

[6]  A. Wenzel,et al.  Validation of the Multidimensional Blood/Injury Phobia Inventory: Evidence for a Unitary Construct , 2003 .

[7]  M. Peruggia.  Model Selection and Multimodel Inference: A Practical Information-Theoretic Approach (2nd ed.) , 2003 .

[8]  David R. Anderson,et al.  Model selection and multimodel inference : a practical information-theoretic approach , 2003 .

[9]  R. P. McDonald,et al.  Principles and practice in reporting structural equation analyses. , 2002, Psychological methods.

[10]  D. Tolin,et al.  Disgust sensitivity and contamination fears in spider and blood-injection-injury phobias. , 2000, Behaviour research and therapy.

[11]  B. Byrne.  Structural Equation Modeling with LISREL, PRELIS, and SIMPLIS: Basic Concepts, Applications, and Programming , 1998 .

[12]  H. Merckelbach,et al.  Blood-injection-injury phobia and fear of spiders: Domain specific individual differences in disgust sensitivity , 1998 .

[13]  R A Kleinknecht,et al.  The role of disgust and fear in blood and injection--related fainting symptoms: a structural equation model. , 1997, Behaviour research and therapy.

[14]  D. Tolin,et al.  Disgust and disgust sensitivity in blood-injection-injury and spider phobia. , 1997, Behaviour research and therapy.

[15]  G. A. Marcoulides,et al.  Advanced structural equation modeling : issues and techniques , 1996 .

[16]  R. MacCallum,et al.  Power analysis and determination of sample size for covariance structure modeling. , 1996 .

[17]  R. Kleinknecht,et al.  Factorial dimensions and correlates of blood, injury, injection and related medical fears: cross validation of the medical fear survey. , 1996, Behaviour research and therapy.

[18]  R. Kessler,et al.  Agoraphobia, simple phobia, and social phobia in the National Comorbidity Survey. , 1996, Archives of general psychiatry.

[19]  G L Burns,et al.  Revision of the Padua Inventory of obsessive compulsive disorder symptoms: distinctions between worry, obsessions, and compulsions. , 1996, Behaviour research and therapy.

[20]  J G Hamilton,et al.  Needle phobia: a neglected diagnosis. , 1995, The Journal of family practice.

[21]  Ko Sm.  Blood-injury phobia. , 1994, Singapore medical journal.

[22]  J. Rabe-Jabłońska,et al.  [Affective disorders in the fourth edition of the classification of mental disorders prepared by the American Psychiatric Association -- diagnostic and statistical manual of mental disorders]. , 1993, Psychiatria polska.

[23]  D H Barlow,et al.  Reliability of DSM-III-R anxiety disorder categories. Using the Anxiety Disorders Interview Schedule-Revised (ADIS-R). , 1993, Archives of general psychiatry.

[24]  Lars-Göran Öst,et al.  One versus five sessions of exposure in the treatment of injection phobia , 1992 .

[25]  D. Watson,et al.  Development and validation of brief measures of positive and negative affect: the PANAS scales. , 1988, Journal of personality and social psychology.

[26]  H. Akaike.  Factor analysis and AIC , 1987 .

[27]  W. Velicer,et al.  Comparison of five rules for determining the number of components to retain. , 1986 .

[28]  Jacob Cohen,et al.  Applied multiple regression/correlation analysis for the behavioral sciences , 1979 .

[29]  Kevin M. Connolly,et al.  Examination of the decline in fear and disgust during exposure to threat-relevant stimuli in blood-injection-injury phobia. , 2007, Journal of anxiety disorders.

[30]  Kevin M. Connolly,et al.  The Disgust Propensity and Sensitivity Scale-Revised: psychometric properties and specificity in relation to anxiety disorder symptoms. , 2007, Journal of anxiety disorders.

[31]  A. Page.  The role of disgust in faintness elicited by blood and injection stimuli. , 2003, Journal of anxiety disorders.

[32]  M. Craske.  Origins of Phobias and Anxiety Disorders: Why More Women than Men? , 2003 .

[33]  D. Westendorf,et al.  Fear, disgust, and information processing in specific phobia: the application of signal detection theory. , 2002, Journal of anxiety disorders.

[34]  Martin M. Antony,et al.  Practitioner's guide to empirically based measures of anxiety , 2002 .

[35]  P. Bentler,et al.  Cutoff criteria for fit indexes in covariance structure analysis : Conventional criteria versus new alternatives , 1999 .

[36]  D. Barlow,et al.  Structure of anxiety and the anxiety disorders: a hierarchical model. , 1996, Journal of abnormal psychology.

[37]  H Fischer,et al.  Gender and age differences in the prevalence of specific fears and phobias. , 1996, Behaviour research and therapy.

[38]  L. Ost.  Blood and injection phobia: background and cognitive, physiological, and behavioral variables. , 1992, Journal of abnormal psychology.

[39]  R. Kleinknecht,et al.  Blood/injury fear, fainting and avoidance of medically-related situations: a family correspondence study. , 1989, Behaviour research and therapy.

[40]  R S Longman,et al.  A Regression Equation for the Parallel Analysis Criterion in Principal Components Analysis: Mean and 95th Percentile Eigenvalues. , 1989, Multivariate behavioral research.

[41]  L. Hayduk.  Structural equation modeling with LISREL , 1987 .

[42]  J. Connolly,et al.  Selective association of fainting with blood-injury-illness fear * , 1976 .

[43]  R. C. Durfee,et al.  MULTIPLE FACTOR ANALYSIS. , 1967 .