Final answer:
It is true that observational and interview data collection can occur simultaneously in clinical case work, offering a well-rounded approach to study participants in their natural environments and obtain detailed insights through interviews.
Step-by-step explanation:
Observational and interview data collection methods can indeed be carried out simultaneously in clinical case work. This integrated approach is true because these methods serve to complement one another, enriching the data collection process. For example, in field observations, a researcher may be observing participants in their natural environment, noting behaviors, interactions, and context. Concurrently, interviews can provide insights into the participants' perspectives, motivations, and explanations for the observed behaviors. In the context of clinical case work, combining observation and interview techniques enables researchers to gain a more holistic understanding of the case at hand. The observational data provides the context and 'real-life' scenarios, while the interview data adds depth through participants' personal narratives and explanations. Furthermore, utilizing multiple methods of data collection helps in triangulating the research results, thereby increasing both the reliability and validity of the findings.