The greatest age-related decline in intelligence has been found with the longitudinal method.
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Q23: A child?s IQ score on an individual
Q24: Cross-sectional studies compare people of different cohorts.
Q25: In longitudinal studies, mean intelligence test scores
Q26: Both cross-sectional and longitudinal studies reveal substantial
Q27: Greater age-related declines in mental abilities have
Q29: A fairly consistent finding of research on
Q30: Mentally dull persons tend to come from
Q31: Intelligence test scores are negatively correlated with
Q32: First-born children tend to be brighter than
Q33: Both intelligence and occupational status are correlated
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