I am running a MANOVA to compare two groups on 17 different dependent variables. In my output below, I see the variable that shows the group effect (for NeuroDX_record_change_1). But what does the intercept in this model mean? This is also statistically significant, but it is unclear to me what this is testing. Any thoughts? Thanks, Kevin

Multivariate Testsa
Effect	Value	F	Hypothesis df	Error df	Sig.
Intercept	Pillai's Trace	.745	101.294b	6.000	208.000	<.001
	Wilks' Lambda	.255	101.294b	6.000	208.000	<.001
	Hotelling's Trace	2.922	101.294b	6.000	208.000	<.001
	Roy's Largest Root	2.922	101.294b	6.000	208.000	<.001
NeuroDX_record_change_1	Pillai's Trace	.182	7.689b	6.000	208.000	<.001
	Wilks' Lambda	.818	7.689b	6.000	208.000	<.001
	Hotelling's Trace	.222	7.689b	6.000	208.000	<.001
	Roy's Largest Root	.222	7.689b	6.000	208.000	<.001
a. Design: Intercept + NeuroDX_record_change_1
b. Exact statistic

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Kevin Duff
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#SPSSStatistics

Hi. As with regression, tests of the intercept test the hypothesis that an obtained value (e.g., a single mean for univariate ANOVA, a combination of means in MANOVA) differs from 0. This test only makes sense to interpret if 0 has a meaning for your dependent measures; that is, if a subject can actually have the value 0.

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Rick Marcantonio
Quality Assurance
IBM
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Original Message:
Sent: 1/5/2023 11:06:00 AM
From: Rick Marcantonio
Subject: RE: intercept in MANOVA

Hi. As with regression, tests of the intercept test the hypothesis that an obtained value (e.g., a single mean for univariate ANOVA, a combination of means in MANOVA) differs from 0. This test only makes sense to interpret if 0 has a meaning for your dependent measures; that is, if a subject can actually have the value 0.

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Rick Marcantonio
Quality Assurance
IBM
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