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The Science Curiosity Scale (SCS) based on a 2pl Item Response Theory Model. SCS scores are standardized with the mean centered at 0 and units measured in standard deviations. Images A and B reflect representative " item response profiles " : the relative probability of the indicated response conditional on a specified level of the latent science curiosity disposition, which is used to estimate subjects' SCS scores. Image C reflects the unidimensionality of the scale. Image D illustrates the measurement precision (test information reliability, similar to Cronbach's alpha) at various levels of science curiosity.  

The Science Curiosity Scale (SCS) based on a 2pl Item Response Theory Model. SCS scores are standardized with the mean centered at 0 and units measured in standard deviations. Images A and B reflect representative " item response profiles " : the relative probability of the indicated response conditional on a specified level of the latent science curiosity disposition, which is used to estimate subjects' SCS scores. Image C reflects the unidimensionality of the scale. Image D illustrates the measurement precision (test information reliability, similar to Cronbach's alpha) at various levels of science curiosity.  

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Paper accepted for presentation at the 38th annual meeting of the Cognitive Science Society

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... resulting scale-the "Science Curiosity Scale" (SCS)-displayed desirable psychometric properties. It was unidimensional (Figure 3, image C), supporting the inference that it measured a single, unitary latent disposition. Moreover, the scale reflected a high level of reliability-at or above α = 0.80-across the entire range of latent science interest disposition (Figure 3, image D). "item response profiles": the relative probability of the indicated response conditional on a specified level of the latent science curiosity disposition, which is used to estimate subjects' SCS scores. ...
Context 2
... was unidimensional (Figure 3, image C), supporting the inference that it measured a single, unitary latent disposition. Moreover, the scale reflected a high level of reliability-at or above α = 0.80-across the entire range of latent science interest disposition (Figure 3, image D). "item response profiles": the relative probability of the indicated response conditional on a specified level of the latent science curiosity disposition, which is used to estimate subjects' SCS scores. ...

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