A developmental psychologist is investigating movement abnormalities as an early symptom of autism. Her research team is collecting data about crawling techniques from videotapes of 9-month-olds. To increase standardization of data collection, she should

Question

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Providing clear definitions of each crawling style with videotaped examples would increase standardization of data collection by ensuring that all researchers are using the same definitions and can easily recognize the different crawling styles. Expanding the study to include 12-month-olds or collecting data only on children with clinically significant crawling deficiencies would not necessarily increase standardization of data collection. Having the research team collect data in person instead of by watching videotapes may introduce observer bias and decrease standardization.

A Developmental Psychologist Is Investigating Movement Abnormalities as an Early