Title
CTest Construct Validation: A Rasch Modeling Approach,Used
Delivery time: 8-12 business days (International)
CTest is an economical test of general language proficiency in the first and second language. Ease of construction and scoring coupled with its cost effectiveness have made CTest a useful instrument for institutions which need a quick placement instrument and second language researchers who need a measure of learners' general language proficiency. The present book addresses CTest construct validity by using the latest developments in modern measurement theory. Probing into the dimensionality of CTest is the main focus of the book. Rasch modeling is used to study different aspects of C Test construct and to clarify the dimensionality issue. In this endeavor exploratory factor analysis, Rasch rating scale model, differential person and item functioning (DIF/DPF), principle component analysis of residuals (PCAR) and item and person measures invariance are used. The results should help CTest users make informed decisions when embarking on using CTest for their next testing project. It should also be useful to language testing researchers who want to investigate some ripe areas of research in CTest.
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Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.