By observing in three twenty-minute blocks instead of one hour, which error is being avoided?

By observing in three twenty-minute blocks instead of one hour, the primary error being avoided is observer fatigue. When an observer is engaged in a single, extended period of observation, they may become tired, leading to decreased attention and focus. This can result in less accurate data collection because their ability to accurately assess and interpret observations diminishes as time goes on.

Shorter observation periods allow the observer to remain more vigilant and attentive, ultimately enhancing the accuracy and reliability of their observations. Breaks between these blocks provide moments for reflection, reducing the cognitive load and allowing the observer to maintain a higher level of performance throughout the entire observation process. This approach helps ensure that any findings gathered reflect a more precise understanding of the observed behavior or situation.