The lab report is a staple of introductory science classes, so anyone who’s taken such a class knows how it goes. There’s a hypothesis, then an experimental procedure, then some data, then a discussion of whether the data agrees with the hypothesis. While the spirit of the assignment is good — emphasizing the importance of empirical verification through an experiment — it perpetuates some key misunderstandings about how real science is done.
As many commentators have previously complained, standard labs teach students that doing science means following a recipe (e.g., the instructions from your lab book), and there is a “right” way to do it and a “wrong” way to do it. (Of course, the “right” way results in data that agrees with the hypothesis.) Practicing scientists know that actual science looks nothing like this. You rarely start with a clearly-defined hypothesis and straightforward experiment to test it. Instead you usually just have some vague idea you want to investigate, and then you do some calculations, perform some experiments, whatever you can think of, but with no guarantee they will work or solve your problem. And often you end up addressing a problem different from the original one you were trying to solve (see my post about this here).
But I contend the lab report fails to teach another important aspect of science: how to craft a persuasive, evidence-based narrative. Real scientists almost never write anything that looks like a lab report. A lab report is, well, just a report: rigid, sterile, lacking any point of view. Reports are what police officers write after they investigate a crime. Scientists write papers for scholarly journals. And scientific papers, in my opinion, are much more like the literary analyses I used to write for humanities classes. They’re persuasive. They have a point of view. You start off with a thesis, which can be pretty specific and quantitative (“My model in equation 1 describes the data well”) or broad and qualitative (“Protein folding stability is the main determinant of protein evolution”). But just like in literary analysis, you’re advancing a point of view, and your job is to convince the reader that it’s valid. To support the thesis you build a narrative based on evidence — in literary analysis, this may be quotations from the work being analyzed or historical facts about the author, while in science the evidence is experimental data and calculations. One professor I had in college described scientists as “lawyers for the natural world.” Your paper describes your case. You are trying to make a persuasive case about some phenomenon in nature, convincing the readers (the jury) that your thesis is correct.
The cold, rigid nature of the lab report pretty much kills this aspect of doing science. To students the lab report mainly serves as proof that they did the experiment “correctly,” and any discussion of the data is perfunctory and merely reiterates what they think is obvious, that the data agrees with the hypothesis. We need to break free from the rigid structure of the lab report and allow students to see their write-ups as opportunities to craft convincing narratives in support of a (scientific) point of view, supported by evidence. We should select topics that allow students to form a non-obvious point of view that must be carefully justified with data and argument, rather than giving them experiments where the outcome is obvious and the data is self-evident. Not only would this teach a much richer and more accurate version of science, but it reveals a major place of harmony for the sciences and humanities: how to use evidence and logical argument to support an idea through writing.