Paper on interaction between priming and directed attention in dichotic listening

In the second paper in my PhD, we presented a prime syllable that participants were instructed to ignore, followed by a dichotic syllable pair. In the first part of the experiment, the participant was asked to report the syllable heard best overall, while in the second and final part of the experiment, the participant was asked to report the syllable heard in the left or the right ear. The results showed

1. the same negative priming effect as reported in the previous paper,
2. an effect of directed attention and
   
3. an interaction between priming and directed attention.

It was argued that the study showed that the two types of attention modulations could coexist, while the interaction indicated that the two may have some overlapping cognitive features.

Sætrevik & Hugdahl (2007a) - Endogenous and exogenous control of attention in dichotic listening - Neuropsychology

As a methodological aside, this paper presents the responses analyzed in three different ways:

1. in terms of laterality of the responses (number of left and right ear responses),
   
2. the response laterality calculated into a "laterality index", and
   
3. responses rescored according to whether the repeated syllable was selected or not, and then calculated into a "priming index".

In light of the following research, I find the third of these approaches to be the most effective in communicating the priming effect.