Gerhard H. Fischer Books

Contributions to Mathematical Psychology, Psychometrics, and Methodology

By Gerhard H. Fischer

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Rasch Models

By Gerhard H. Fischer

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This edited volume comprises twenty-one chapters written by leading experts who have closely cooperated to present a self contained and unified overview of results thus far scattered or waiting for...

Rasch Models

By Gerhard H. Fischer, Ivo W. Molenaar

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Psychometrischen Grundlagen des Rorschachtests und der Holtzman Inkblot Technique von Gerhard H. Fischer und Hans Spada.

By Gerhard H. Fischer

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Einfuhrung in die Theorie psychologischer Tests

By Gerhard H. Fischer

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Contributions to mathematical psychology, psychometrics, and methodology

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Rasch Models

By Gerhard H. Fischer, Ivo W. Molenaar

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Contributions to Mathematical Psychology Psychometrics and Methodology

By Gerhard H. Fischer, Donald Laming

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.