Figure 3
From: A simulated comparison of behavioural observation sampling methods

Example of simulated data for response frequency for high (3 s), medium (30 s), and low (300 s) frequency behaviours. This results in the frequency (event) occurring for exactly 33, 3.3, and 0.3% of the one-hour simulation, respectively. The high frequency occurs so often that it appears as a solid line, but the behaviour is in fact occurring once in each 3 s period.