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Published on: May 10, 2019
Inverse effectiveness, multisensory integration, and the bodily self: some statistical considerations.
1Department of Psychology, Hebrew University of Jerusalem, Mount Scopus, Jerusalem 91905, Israel. npholmes@neurobiography.info
Consciousness and Cognition
|May 27, 2009
Summary
The rubber hand illusion (RHI) study may be affected by statistical biases. Researchers caution that without addressing
Area of Science:
- Neuroscience
- Cognitive Psychology
Background:
- The multisensory principle of inverse effectiveness (PoIE) suggests that the combination of two stimuli is most effective when individual stimuli are weak.
- A recent study in Consciousness and Cognition used the rubber hand illusion (RHI) to investigate the PoIE.
Discussion:
- This analysis examines two methods for assessing the PoIE: 'a priori' and 'post-hoc'.
- The 'post-hoc' method is susceptible to the statistical artifact of 'regression towards the mean'.
- This artifact may have influenced previous conclusions regarding the PoIE, particularly in the context of RHI studies.
Key Insights:
- The 'regression towards the mean' artifact can bias inferential statistics in PoIE assessments.
- While the recent RHI study's core conclusions might not be significantly altered, its statistical methods were likely compromised.
- Strong evidence for the PoIE remains elusive due to these statistical challenges.
Outlook:
- Future research must rigorously account for statistical artifacts like 'regression towards the mean'.
- Advancements in statistical methodologies are crucial for reliably assessing the PoIE.
- Without these improvements, definitive support for the PoIE will be difficult to establish.
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01:11Sensory Perception: Organization of the Somatosensory System
The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
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The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the stimulus...