Project #22195 - Hypothesis - driven experimentation and the underlying physiological principles

Students must demonstrate that she/he understands how hypothesis sriven expermintation works and the underlying physiological principles.

 The grading criteria reflect this emphasis by rewarding scientific reasoning and understanding of physiological principles rather than busywork. a student has not thought about the relationship between his/her experimental design and the hypothesis, or has failed to analyze the data in relationship to the hypothesis, he/she should not

receive more than 8 -10 points.In previous semesters, student reports suffered because 1) they did not think enough about experimental design before coming to class, 2) they filled their reports with techniques already given in the lab handouts, and/or most commonly 3) they did not critically analyze their data. Skim through all the reports before attempting to apply a numerical grade. Then read each report carefully, but don’t spend an hour on 

each one. Start with the best reports because they are the easiest to grade. Give the students constructivecriticism, but don’t try to rewrite their reports for them. 


I. Introduction: 4 pts, 1 - 2 pages 

 ? Clear statement of hypothesis (1 pt) 


? Rationale for hypothesis with clear description of relevant physiological concepts (2 pts) 

 - a range of reasonable hypotheses are possible 


? Prediction of results based on hypothesis (1 pt) 

 - deduct if predictions don’t address hypothesis or don’t follow logically from hypothesis and 

exp. design 

Don’t deduct excessively if student doesn’t clearly distinguish between a hypothesis and a 



II. Experimental Design: 2 pts, 1 page at most 

? Coherent description of experiment, with focus on design 

? Students should cite pages in lab manual for description of techniques 

? Deduct points if student wastes space rambling on about methods given in manual 


III. Results: 4 pts, 1 page at most 

? Concise description of most important results 

? Results presented should answer questions relevant to major hypothesis 

? Deduct if info presented is superfluous 


IV. Discussion: 6 pts, around 2 pages 

? Restate hypothesis, predictions and the key results (2 pts) 

? Do the data support the hypothesis (prediction)? Why or why not? What do the data tell us about some 

principle in endocrine physiology? (3 pts) 

? Propose alternative hypothesis and/or future experiments (1 pt) 


V. Tables, Graphs, Calculations: 4 pts 

? Relevant data sets should be presented graphically or tabulated (or both) in a way that allows you to 

easily determine if the data support the hypothesis. 

? For full credit, the tables and/or graphs don’t have to be publication quality but they should summarize 

the data in a way that demonstrates understanding of the experiment. 







Lab Report Tips

General Tips

·      Use the worksheet you filled out in class.  A lot of the information you need is in that worksheet.

·      Make sure to read your Lab Write up guide. It goes into detail on what I am expecting (the rubric is very general so if you want something more detailed please read that).

·      Your graphs need to be done on a graphing program! I will not accept handwritten graphs. Also, tables need to be done on the computer; I will not accept handwritten tables either. Make them look professional.

·      Double check your sentence structure and spelling before turning in your lab report. You need to use complete sentences.

·      Please ask your TA if you are unsure of your dependent and independent variables.

·      Discuss your results with the TA to make sure you understand them.

·      Come to office hours prior to submitting your lab report. You will get feedback on expectations and how to improve your lab report.

·      Write professionally. Do not put exclamation points after your sentences.

·      Use in-text citations and have references at the end of your lab report.



·      Make sure to give enough background information about the topic. Make sure to define any important concepts that are relevant to your hypothesis and predictions

o   For example, in your cardiovascular lab report it is important to discuss CO, MAP, and TPR. It is also important to mention exercise and its impact on these variables

·      You should mention the importance of this experiment.

o   Ask yourself: Why is it important that we do this experiment?

o   Hint: What does your TA want you to learn?

§  For example, in your cardiovascular lab report your TA wants you to talk about cardiovascular physiology!

·      You should have a clear statement of observation, question, predictions, and hypothesis.

o   You need to clearly state this is a hypothesis and this is a prediction. If your friend who is not taking the class can’t find your hypothesis or predictions then it is not CLEAR.

§  For example: The hypothesis for this experiment is that CO increases during sustainable exercise because there is an increase blood flow to the muscles.

·      For your predictions, make sure you give an explanation of why you think they are correct.



·      Make sure to give a detailed description of your experimental design. The reader should be able to replicate it based on your description.

·      Clearly identify: dependent, independent, controls, and sample size.



·      Your results section should ONLY have results. Do not analyze your results in this section (you analyze your results in the conclusion).

·      During your paragraph description, you should include both quantitative and qualitative data.

o   Quantitative (has numbers): TPR decreased by 12.5% from baseline to light exercise. 

o   Qualitative (no numbers): As CO increased TPR decreased in all subjects.

·      Make sure your graphs have your dependent and independent variables on them. That is what we are interested on.

·      All graphs should have axes labeled and a proper title. Make sure to include units (very important). Include a description of what the graph shows.

·      All tables should have a title and description. 



·      This is the most important and usually longest part of your lab report.

·      Make sure to restate your hypothesis, predictions and key results.

·      The most important part of your lab report is analyzing your results and giving physiologic reasoning for why you obtained those results.

o   Give detailed explanations.

o   What is going on in the body that caused MAP to increase or TPR to decrease?

·      Make sure you discuss any odd results.

o   If your data does not match what you think should have happened, do NOT automatically attribute it to experimental error without getting to TA to agree. Most likely the data is fine, and you’re not realizing what is actually happening. (Cardiovascular Physiology Write-up Guide)

·      Propose alternative hypothesis and/or future experiments

Subject Science
Due By (Pacific Time) 02/14/2014 12:00 am
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