The goal of this research is to understand the relationship between participants’ affective state and their attentional breadth. There are competing theories regarding how different aspects of affective state (valence versus motivational intensity) might influence attentional breadth. A common approach to testing these models has been to attempt to experimentally induce different affective states. However, there are now multiple studies in the literature that have failed to replicate any influence of such experimentally induced affective state on attentional breadth. This could be because it is difficult to ethically experimentally induce a sufficiently potent and sustained affective state. An alternative approach is to utilise naturalistic variation in participants’ affective state at the time of the study – influenced by real-life events that have happened to them prior to participating. We will also measure trait affective tendencies to assess the selectivity of state versus trait associations with attentional breadth. We will collect two different types of affective ratings, those that predominately reflect the valence of one’s affective state, and those that predominately affect the motivational intensity of one’s affective state. This will allow us to assess the relative contribution of each to explaining variance in observed attentional breadth.