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. Author manuscript; available in PMC: 2019 Jun 1.
Published in final edited form as: Dev Psychol. 2018 Mar 29;54(6):1148–1158. doi: 10.1037/dev0000510

Figure 1.

Figure 1

Test information function (solid line) and standard error function (dashed line). The y-axis on the left indicates the amount of information (I), an index of how precisely the cannabis-related word association test estimates the latent trait at a given level of theta. The y-axis on the right shows standard error, which is the inverse of the square root of test information. The x-axis represents the level of theta, or the latent cannabis-related associative memory, with 0 representing the mean level of theta.