v > collect changes over time. This type of data collection is expensive. This type of data is time- consuming. I distributed an online survey to students the first week of classes. Then I gave them another online survey the third week. distributed an online survey to students one week, asking how they felt about the course. This type of study is quick. 1. Longitudinal 2. Cross-sectional Are the following studies longitudinal or cross-sectional? L > This type of data collection is inexpensive. This type of data is rich - providing substantive details in responses. This type of data may suffer from mortality. This is data collected at one point in time. This type of data does not collect changes over time. This type of data collection is expensive. This type of data is time- consuming 1. Longitudinal 2. Cross-sectional