I am trying to define an equation to model a psychological phenomenon such as e.g.:
$B=\sum_{i=1}^k (P_{ij} T_j)$
Where $B$ is boredom, $j$ is an attribute of a given situation, $i$ is a stimulus in that situation, $P_{ij}$ is the performance perception of that stimulus $i$ over attribute $j$, and $T_j$ is the effect of the time of the day over attribute $j$
My question is, does $T_j$ states what I want to say (i.e., that $j$ is affected by the time of the day)? Or it would be more appropriate to use $T_{ij}$ or other notation instead?
Thanks