Data collection methods are the tools or techniques used to gather data from sources. These methods can include surveys, interviews, focus groups, observations, and stories. Depending on the source and nature of the data, different data collection methods may be more effective. For instance, surveys are better for collecting quantitative data from a large sample, while interviews may be better for qualitative data from a small sample. Focus groups are better for qualitative data from a group of respondents who can interact, while observations are better for collecting qualitative data in a natural or controlled setting. Finally, stories are better for qualitative data from a diverse sample. However, each method has its own limitations; surveys may not capture depth or diversity of responses, interviews can be affected by bias or expectations, focus groups can be dominated by some participants or influenced by peer pressure, observations can be affected by the observer's presence or interpretation, and stories may be influenced by the storyteller's memory or motivation.