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What evidence do we have that the accretion disk that formed the Solar System was initially very centrally condensed?
Parallel Forms Reliability
The consistency of the results of two tests constructed in the same way from the same content domain.
Internal Validity
The extent to which a study establishes a trustworthy cause-and-effect relationship between a treatment and an outcome.
Observed Score
The score actually obtained by an individual on a test or measurement.
True Score
The true score in psychometrics is an estimate of an individual's actual ability or trait level, free from measurement error.
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