The Partnership for Assessment of Readiness for College and Careers (PARCC) field tests during the spring of 2014 provided an opportunity to investigate the quality of the items, tasks, and associated stimuli. HumRRO conducted several research studies summarized in this report. Quality of test items is integral to the "Theory of Action" (TOA) for PARCC. A TOA indicates the intended uses and expected impact of an assessment system and informs testable claims related to the interpretation of test scores (i.e., the "Interpretive Argument"). The evidence to support those claims and assumptions represents the "Validity Argument" for PARCC. The findings included in this report speak to the validity argument for the Design, Development, Administration, and Scoring phases of PARCC. Conclusions described refer to the PARCC field test administration. One purpose of the field test was to gather information about items prior to operational administration. A substantial number of items will be dropped or revised prior to operational testing. This is an expected result of field testing and does not represent a criticism of the operational test. The number and proportion of items that do not meet statistical criteria for some grade subjects, especially for math course assessments, may limit the number of forms that can be constructed with adequate content representation.