Packing and unpacking sources of validity evidence: history repeats itself again / Stephen G. Sireci -- Validating the interpretations and uses of test scores / Michael Kane -- Validity as contextualized and pragmatic explanation, and its implications for validation practice / Bruno D. Zumbo -- Validity from the perspective of model-based reasoning / Robert J. Mislevy -- Invalidity in validity / Joel Michell -- The end of construct validity / Denny Borsboom ... [et al.] -- Validity in action: state assessment validity evidence for compliance with NCLB / William D. Schafer, Joyce Wang, and Vivian Wang -- The concept of validity in the context of NCLB / Robert L. Linn -- Validity is in the eye of the beholder: conveying SAT research findings to the general public / Krista Mattern ... [et al.] -- Content validity considerations in language testing contexts / Micheline Chalhoub-Deville