Skaggs, Gary, <br/><br/>
Test development and validation / 
Gary Skaggs. 
 - xvii, 390 pages :  illustrations ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781544377148  RM458.62 (PTSL) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Methodology.<br/>Social sciences--Research.<br/>Scaling (Social sciences).