Accelerometer-Measured Versus Self-reported Physical Activity in College Students: Implications for Research and Practice

Objective: To determine the level of moderate-vigorous physical activity (MVPA) assessed via self-report and accelerometer in the college population, and to examine intrapersonal and contextual variables associated with PA. Participants: Participants were 77 college students at a university in the northwest sampled between January 2011 and December 2011. Methods: Participants completed a validated self-report measure of PA and measures of athletic identity and benefits and barriers to exercise. Participants’ PA levels were assessed for two weeks via accelerometry. Results: Participants’ estimations of their time spent engaged in MVPA was significantly higher when measured via self-report vs. accelerometry. Stronger athletic identity, perceived social benefits and barriers, and time-effort barriers were related to PA levels. Conclusions: Estimation of college level PA may require interpretation of data from different measurement methods, as self-report and accelerometry generate different estimations of PA in college students who may be even less active than previously believed

Association between Psychosocial and Organizational Factors and Objectively Measured Sedentary Behavior in Desk-Dependent Office Workers

Cross-sectional analysis of data from the Recharge@Work study was used to assess individual, interpersonal and organizational correlates of objectively- measured sedentary time, in desk-dependent office workers at 2 U.S. hospitals. Analysis included 65 participants (62 females and ~49.2 years old). Sedentary time was assessed by accelerometry across five consecutive days and expressed as prolonged sedentary bouts (60 min ≤ 150 cpm). Correlates measured a baseline included: age, BMI, active break enjoyment, active break outcome expectancy, active break self-efficacy, active break social support, direct supervisor support of active breaks and senior manager support of active breaks. As expected, we found that the more individuals perceived their supervisor as supportive of active breaks and the more they enjoyed active breaks, the more likely they were to actually take active breaks (i.e., to experience less sedentary time, OR = 2.8, CI = 1.1–7.1; OR = 5.2, CI = 1.4–19.2 respectively). However, contrary to our expectations, the more employees perceived their senior managers as supportive of active breaks, the less likely they were to take these breaks (OR = 0.29, CI = 0.09–0.93). No significant associations were found between age, gender, BMI, outcome expectancy, or self-efficacy and active breaks from sedentary behavior

Price Dispersion and Inflation: Evidence from Israel.

This paper considers the question of whether observed price differe ntials reflect perceived differences in quality, service agreements, or location, or whether information imperfections can explain this phenomenon. It sets out theoretical arguments linking inflation to reductions in the information stock held by agents and thus to greater price dispersion. The hypothesis is tested using monthly price data for thirteen uniquely-defined goods sold in Israel between 1971 and 1984. Price dispersion is shown to be positively related to the rate of market price inflation. Since inflation is an unlikely proxy for changes in perceived characteristics, the findings support price dispersion theories based on "optimally imperfect" decision making. Copyright 1988 by University of Chicago Press.

Evaluation of Potential Power Generation Projects for Entryinto Pacific Northwest Power Market

This paper presents four economical approach concepts to repowering Northwest power plants. The principles and advantages of combined heat and power generation, wind and geothermal technologies are presented, along with research on their planning, and analysis of the respective energy management methods and cost differences