Answer: Yes, because if there is not enough detail, your audience will not know what you are talking about which will cause them to lose interest. The goal is to be concise without overdoing it so your audience will not be bored into a stupor and they will understand and enjoy your speech.
You can increase the validity of an experiment by controlling more variables, improving measurement technique, increasing randomization to reduce sample bias, blinding the experiment, and adding control or placebo groups.