Theory of Mind (ToM) Performance in High Functioning Autism (HFA) and Schizotypal-Schizoid Personality Disorders (SSPD) Patients.
Adults with autism stumble on both thought and emotion mind-reading tasks, while adults with schizotypal traits only stumble on thought tasks—use this split to refine diagnosis.
01Research in Context
What this study did
Tereza-Mas et al. (2019) compared how well adults read minds. They tested three groups: adults with high-functioning autism, adults with schizotypal-schizoid personality, and neurotypical adults.
Each person did standard theory-of-mind tasks. Some tasks checked if they could guess thoughts. Others checked if they could guess feelings.
What they found
The autism group struggled with every kind of mind-reading task. They missed both thoughts and feelings.
The personality-disorder group only missed the thought tasks. They could still read feelings fine.
How this fits with other research
Cohrs et al. (2017) saw the same wide mind-reading gaps in autistic youth. Tereza-Maria shows the pattern holds into adulthood and adds a new contrast group.
Amorim et al. (2025) found that IQ and social traits predict mind-reading more than the diagnosis label. The current study echoes that idea: different diagnoses show different weak spots, not just overall lower scores.
Kaland et al. (2008) warned that each mind-reading task taps a unique skill. The 2019 paper keeps that caution alive: clinicians must test both thoughts and feelings, not just give one task.
Why it matters
If a client can read emotions but fails thought tasks, autism is more likely than schizotypal traits. Use separate sub-tests in your ToM battery. Score cognitive and affective items apart. This small step sharpens differential diagnosis and keeps treatment goals clear.
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02At a glance
03Original abstract
The similarities between high functioning autism (HFA) and schizotypal-schizoid personality disorder (SSPD) in terms of social cognition and interpersonal deficits may lead to confusion in symptom interpretation, and consequently result in misdiagnosis. Thus, this study aims to investigate differences in mentalizing with particular interest on the socio-cognitive and socio-affective dimensions. Three Advanced Theory of Mind (ToM) tests were applied in 35 patients with HFA, 30 patients with SSPD and 36 healthy controls. Individuals with HFA showed greater impairment and no dissociation between affective and cognitive ToM components. Conversely, SSPD individuals displayed less difficulties but greater impairments on the cognitive component. Beyond the replicability of ToM impairment in HFA individuals, our findings suggest more impaired cognitive ToM in SSPD participants which further support the sequence of mentalizing development build upon different chronological stages.
Journal of autism and developmental disorders, 2019 · doi:10.1007/s10803-019-04058-1