Laban Effort in Empty-Handed Interactions of Hindustani Dhrupad Vocal Improvisation

Effort, commonly understood as the power of an action toward an intended goal, is acknowledged as an important aspect of music expressivity. Previous studies in Hindustani Dhrupad vocal improvisation, particularly those focusing on manual interactions with imaginary objects, have revealed the intricate connection between effort and various movement and melodic variables. The study employed manual annotations by participants who visually inspected and assessed the amount of effort that such interactions were perceived to require. However, since effort is inherently perceptual and subjective and the way that an observer makes assessments on effort levels remains a non-transparent process, the paper seeks to examine the applicability of the Laban Movement Analysis (LMA) system in this task. For this, it relies on a multi-way analysis of variance (ANOVA) to infer manually annotated (numerical) effort levels from Laban’s (categorical) Effort Factors, namely Weight, Flow, Time, and Space, for two Dhrupad performances. The results suggest that apart from the Space factor, which was excluded for reasons delineated, a good part of effort’s variance can be explained through the remaining three statistically significant Effort Factors, leading to the rejection of the null hypothesis that they are unrelated. By ascertaining this relationship, effort-related melodic aspects in Dhrupad improvisation can be predicted using the three Laban Effort Factors.