Frequently Asked Questions
Answers to Frequently Asked Questions
1. You do not need to obtain permission in order to use Common Cold Project data or to conduct specific analyses. However, in order to access the data, you need to complete a registration form indicating your agreement with the terms of data use in order to access the data. We also request that you complete the data analysis form that asks you for information about which data set(s) you plan to use and the primary research questions you plan to address.
2. As discussed elsewhere, we have designed this website so that investigators can combine data across any or all of the 5 cold studies when the appropriate variables are available. A major challenge in accomplishing this aim was that the same construct was sometimes represented differently in one or more of the studies. For example, the anxious mood subscale that was computed from participants’ reports of daily emotional states while in quarantine was comprised of 4 items in PCS1, 3 items in PCS2, and 2 items in PMBC and PCS3. It is important to remember that these studies were all designed individually, and not with the intent of being combined. Measures for each study were chosen because they best represented our view of a variable at the time of designing a particular study or because they best fit the questions we were addressing in a particular study. The idea of aggregating these studies did not arise until after the fact.
In order to use such variables in the aggregate data set, we needed to homogenize them, i.e., use the same definitions. Consequently, there are key variables in the aggregate data set that are different than the same variables in the original individual data sets. In most cases, the differences are trivial. However, they are important for accurately defining variables used in aggregate analyses. It is also important that investigators analyzing an individual data set (especially those replicating previously reported analyses) to use the original variables from the individual studies.
Another issue of importance involves the publication of findings derived from aggregated data that replicate published results that were derived from a specific study’s data set. To avoid redundancy, we recommend that investigators conduct secondary analyses excluding the previously published data.3. All 5 studies received approval from the relevant institutional review board(s). Specific details regarding participant informed consent are available on the Human Subjects page.
4. If you publish a paper using Common Cold Project data, we request that you complete the CCP Data Set Publication form.
5. See Citation Guidelines.
6. The decision to aggregate, archive, and document the data collected during the 5 cold studies was not made until well after the first four studies had been completed. Although we tried to the best of our ability to retrieve as much of the original documentation materials as possible, some information inevitably was lost.