This section explains some of the technical background behind the construction of the Junior Science: Thinking with Evidence assessment. You will find:
- an explanation of how the measurement scale (JS) was developed and how it can be used
- information about how NZCER conducted the research to standardise this assessment
- summary statistics for the tests based on the JS scale
- a discussion about the reliability, validity, and differential performance of the items across sub groups of the population
- tables that show the connection between raw score, scale score and reference levels for each year.
Download the Technical information document
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