According to the slide presentation for chapter 12 for the Cooper and Schindler text, there are four sources of measurement error: 1) errors on the part of respondents/study participants; 2) errors due to situational factors that affect study results; 3) errors on the part of the measurer/researcher; and 4) errors in the measurement instrument/survey. Provide two examples for each source of measurement error and include how each example might likely influence research results.