IQ and academic performance

What are antecedents of schizophrenia?

Antecedents are subtle deviations in development that may become evident during childhood or adolescence. The presence of these deviations may foreshadow the later development of schizophrenia, however most children who exhibit these antecedents do not develop the disorder. Studies exploring antecedents are ideally based on representative, population-based samples that follow the group from birth through childhood and adolescence to adulthood. These studies can provide unique insights into the changes in developmental trajectories that may be associated with schizophrenia.

What is the evidence for IQ and academic performance as antecedents for schizophrenia?

Moderate to high quality evidence found lower IQ scores, lower general academic scores, and lower mathematics scores during childhood or adolescence in those who were later diagnosed with schizophrenia. They also recorded lower education levels.

Lower general academic achievement was found in youth with psychotic-like experiences and in youth with a family history of schizophrenia when compared to children not at risk of schizophrenia. There were also lower education levels in these youth.

March 2022

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Last updated at: 3:26 pm, 29th March 2022
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