We might also want to examine the relationships between items and optimism and pessimism constructs with IRT. Lets start looking at the relationship with optimism for each item. We see that each item has a reasonably good discrimination across the range of the latent variable.

And now lets look at the pessimism items. Again, reasonably good discrimination across the range of responses.

In both cases the IIC are dominated by two items, but I don’t think that’s an issue.