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The method for tallying and categorizing objects according to their time interval is called interval recording. It involves dividing a specific time period into equal intervals and then observing and recording the presence or absence of a behavior or event within each interval. The data collected is then tabulated into categories, such as the number of occurrences per interval or the total duration of the behavior over the entire observation period. Interval recording is a commonly used method in behavioral research and can provide valuable insights into patterns and trends in behavior over time.