  The Global Precedence Effect (GPE) suggests that the processing of global
properties of a visual stimulus precedes the processing of local properties.
The generality of this theory was argued for four decades during different
known Perceptual Field Variables. The effect size of various PFVs, regarding
the findings during these four decades, were pooled in our recent meta-analysis
study. Pursuing the study, in the present paper, we explore the effects of
Congruency, Size, and Sparsity and their interaction on global advantage in two
different experiments with different task paradigms; Matching judgment and
Similarity judgment. Upon results of these experiments, Congruency and Size
have significant effects and Sparsity has small effects. Also, the task
paradigm and its interaction with other PFVs are shown significant effects in
this study, which shows the prominence of the role of task paradigms in
evaluating PFVs' effects on GPE. Also, we found that the effects of these
parameters were not specific to the special condition that individuals were
instructed to retinal stabilize. So, the experiments were more extendible to
daily human behavior.
