20240110 - typo

09-Item-Response-Theory.Rmd

@@ -245,7 +245,7 @@ difficulty_long$Difficulty[which(difficulty_long$item == "highDifficulty")] <- "
 
 (ref:iccDifficulty) Item Characteristic Curves of an Item With Low Difficulty Versus High Difficulty. The dashed horizontal line indicates a probability of item endorsement of .50. The dashed vertical line is the item difficulty, i.e., the person's level on the construct (the location on the x-axis) at the inflection point of the item characteristic curve. In a two-parameter logistic model, the inflection point corresponds to the probability of item endorsement is 50%. Thus, in a two-parameter logistic model, the difficulty of an item is the person's level on the construct where the probability of endorsing the item is 50%.
 
-```{r iccDifficulty, echo = FALSE, results = "hide", out.width = "100%", fig.align = "center", fig.cap = "(ref:iccDifficulty)"", fig.scap = "Item Characteristic Curves of an Item With Low Difficulty Versus High Difficulty.}
+```{r iccDifficulty, echo = FALSE, results = "hide", out.width = "100%", fig.align = "center", fig.cap = "(ref:iccDifficulty)", fig.scap = "Item Characteristic Curves of an Item With Low Difficulty Versus High Difficulty.}
 ggplot(difficulty_long, aes(theta, value, group = Difficulty, color = Difficulty)) +
   geom_line(linewidth = 1.5) +
   scale_color_viridis_d() +