The Producer Price Index (PPI) program measures the average change over time in the selling prices received by domestic producers for their output. The prices included in the PPI are from …

In this chapter we will cover how to analyze task-related data by using a technique called Psychophysiological Interactions (PPI), which reveals whether the functional connectivity …

Psychophysiological interaction (PPI) is a brain connectivity analysis method for functional brain imaging data, mainly functional magnetic resonance imaging (fMRI).

Psychophysiological interactions (PPIs) analysis is a method for investigating task-specific changes in the relationship between activity in different brain areas, using functional magnetic …

PPI analysis - Create PPI variable PPIs can be calculated either by pressing the PPIs button in the SPM Menu window, or by selecting the Physio/Psycho-Physiologic menu item from the …

Jan 28, 2025 · What Is the Producer Price Index (PPI)? The Producer Price Index (PPI) measures the average change over time in the prices domestic producers receive for their output. It is a...

In this paper, we mainly focus on two methods that have been developed to study task modulated connectivity for task fMRI data, namely psychophysiological interaction (PPI) (K J Friston et al. …

PPI (psychophysiological interactions) is a method for finding out whether the correlation in activity between two distant brain areas is different in different psychological contexts – in …

Other than the seed time course, such a context-dependent correlation analysis, aka psychophysiological interaction or physiophysiological interaction (PPI), requires the insertion …

The overall goal of a PPI analysis is to understand how the demands of a cognitive task influence or modulate the functional connectivity of a seed region. A PPI analysis requires a strong a …