Which visual acuity method is an example of a forced choice method?

The Teller acuity method is an example of a forced choice method because it involves presenting the observer with distinct visual stimuli, where the observer must identify which stimulus is different or more prominent. This method uses striped patterns, and the observer indicates which side of the display the stripes are oriented. The forced choice aspect comes from the requirement that the observer always selects an option, either by choosing one side or indicating a preference, making it a binary response system.

This methodology is particularly effective for assessing visual acuity in very young children or those who may be unable to provide verbal or conventional responses, as it circumvents the need for language comprehension or precise measurement of subjective visual experiences. By creating a situation where the observer has to make a choice between clear alternatives, it yields more reliable and quantifiable results on visual acuity compared to other methods that may rely heavily on subjective interpretation of visual perception without a forced choice context.