Observation methods are useful to researchers in a variety of ways. They provide researchers with ways to check for nonverbal expression of feelings, determine who interacts with whom, grasp how participants communicate with each other, and check for how much time is spent on various activities (SCHMUCK, 1997). Participant observation allows researchers to check definitions of terms that participants use in interviews, observe events that informants may be unable or unwilling to share when doing so would be impolitic, impolite, or insensitive, and observe situations informants have described in interviews, thereby making them aware of distortions or inaccuracies in description provided by those informants (MARSHALL & ROSSMAN, 1995). 
5.1 Limitations of observation
Several researchers have noted the limitations involved with using observations as a tool for data collection. For example, DeWALT and DeWALT (2002) note that male and female researchers have access to different information, as they have access to different people, settings, and bodies of knowledge. Participant observation is conducted by a biased human who serves as the instrument for data collection; the researcher must understand how his/her gender, sexuality, ethnicity, class, and theoretical approach may affect observation, analysis, and interpretation. 
Another limitation involved in conducting observations is noted by DeWALT, DeWALT, and WAYLAND (1998). The researcher must determine to what extent he/she will participate in the lives of the participants and whether to intervene in a situation. Another potential limitation they mention is that of researcher bias. They note that, unless ethnographers use other methods than just participant observation, there is likelihood that they will fail to report the negative aspects of the cultural members. They encourage the novice researcher to practice reflexivity at the beginning of one's research to help him/her understand the biases he/she has that may interfere with correct interpretation of what is observed. Researcher bias is one of the aspects of qualitative research that has led to the view that qualitative research is subjective, rather than objective. According to RATNER (2002), some qualitative researchers believe that one cannot be both objective and subjective, while others believe that the two can coexist, that one's subjectivity can facilitate understanding the world of others. He notes that, when one reflects on one's biases, he/she can then recognize those biases that may distort understanding and replace them with those that help him/her to be more objective. In this way, he suggests, the researcher is being respectful of the participants by using a variety of methods to ensure that what he/she thinks is being said, in fact, matches the understanding of the participant. BREUER and ROTH (2003) use a variety of methods for knowledge production, including, for example, positioning or various points of view, different frames of reference, such as special or temporal relativity, perceptual schemata based on experience, and interaction with the social context—understanding that any interaction changes the observed object. Using different approaches to data collection and observation, in particular, leads to richer understanding of the social context and the participants therein. 
SCHENSUL, SCHENSUL, and LeCOMPTE (1999) also suggest that observation is filtered through one's interpretive frames and that "the most accurate observations are shaped by formative theoretical frameworks and scrupulous attention to detail" (p.95). The quality of the participant observation depends upon the skill of the researcher to observe, document, and interpret what has been observed. It is important in the early stages of the research process for the researcher to make accurate observation field notes without imposing...