Principal components analysis demonstrates a common schizoidal phenotype within autistic and schizotypal tendency: implications for neuroscientific studies.
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1
Swinburne University of Technology, Australia
Behavioural and cognitive similarities within the autism and schizophrenia spectra have been extensively reported, particularly in terms of pervasive social cognitive and communication dysfunction (Barneveld et al 2011; Hurst et al, 2007; Solomon et al 2011). We investigate how these disorders represent a similar phenotype at a personality level, in schizoid personality types. Positive schizotypy has been found as diametric to autistic tendency and Negative schizotypy through Principal Components Analysis (PCA) (Dinsdale et al, 2013), leading to confusion in distinguishing the two spectrum disorders.
The Autism Spectrum Quotient (AQ) and Schizotypal Personality Questionnaire (SPQ) were combined and presented to 130 (61 male, 69 female) non-clinical participants aged 18-39. A PCA revealed a three component solution, the first component reflected Perceptual-Behavioural Oddities (Cognitive-Perceptual and Disorganised SPQ), the second; Interpersonal-Communication Dysfunction (Interpersonal SPQ and AQ), and the third; Odd Beliefs (SPQ). AQ was strongly correlated with Interpersonal-Communication (r=0.81, p
References
Barneveld PS, Pieterse J, de Sonneville L, van Rijn S, Lahuis B, et al. (2011) Overlap of autistic and schizotypal traits in adolescents with Autism Spectrum Disorders. Schizophenia Bulletin 126: 231-236.
Dinsdale NL, Hurd PL, Wakayabashi A, Elliot M, Crespi BJ (2013) How Are Autism and Schizotypy Related? Evidence from a Non-Clinical Population. PLoS ONE 8: 1-10
Hurst RM, Nelson-Gray RO, Mitchell JT, Kwapil TR (2007) The relationship of Asperger's characteristics and schizotypal personality traits in a non-clinical adult sample. Journal of Autism and Developmental Disorders 37: 1711-1720
Solomon M, Olsen E, Niendam T, Ragland JD, Yoon J, et al. (2011) From lumping to splitting and back again: Atypical social and language development in individuals with clinical-high-risk for psychosis, first episode schizophrenia, and autism spectrum disorders. Schizophrenia Research 131: 146-151
Keywords:
autistic tendency,
schizotypal personality,
schizoid personality,
Principal Components Analysis (PCA),
social cognition
Conference:
ACNS-2013 Australasian Cognitive Neuroscience Society Conference, Clayton, Melbourne, Australia, 28 Nov - 1 Dec, 2013.
Presentation Type:
Poster
Topic:
Other
Citation:
Ford
TC and
Crewther
DP
(2013). Principal components analysis demonstrates a common schizoidal phenotype within autistic and schizotypal tendency: implications for neuroscientific studies..
Conference Abstract:
ACNS-2013 Australasian Cognitive Neuroscience Society Conference.
doi: 10.3389/conf.fnhum.2013.212.00058
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Received:
15 Oct 2013;
Published Online:
25 Nov 2013.
*
Correspondence:
Miss. Talitha C Ford, Swinburne University of Technology, Melbourne, Australia, talitha.ford@deakin.edu.au