Strength of self disclosure (SD)
Scientific and controlled evidence
Sprecher did a lab study where pps had structures conversations with their partner and were observed. Found that high levels of self disclosure led to high levels of intimacy - felt more closer and connected
Because this was a controlled experiment it clearly shows that self disclosure can lead to greater intimacy. The controlled setting also means that study can be repeated - increased reliability
Therefore, this study improves the internal validity and credibility of self disclosure as an explanation as it shows a link between self disclosure and intimacy which helps us to understand how relationships grow