Research Methodology and Experimental Design Flashcards

Which type of experimental design is most appropriate when a research chef wants to test the effect of three different hydrocolloids on gel strength while controlling for temperature and pH?

Answer: Factorial Design

A factorial design allows simultaneous testing of multiple independent variables (hydrocolloid type, temperature, and pH) and their interactions on gel strength.

In product development research, what is the primary purpose of a control sample?

Answer: To provide a baseline against which experimental samples are compared

A control sample establishes a baseline or reference point so that differences observed in experimental samples can be meaningfully attributed to the variable being tested.

A research chef runs the same bench-top experiment five times under identical conditions to obtain five yield measurements. This practice improves which aspect of the study?

Answer: Reliability (repeatability)

Repeating the same experiment multiple times under identical conditions measures reliability/repeatability, confirming that results are consistent and not due to random error.

Which statistical test is most commonly used to compare the means of three or more independent formulation groups in food product development?

Answer: One-way ANOVA

One-way ANOVA (Analysis of Variance) is the standard method for comparing means across three or more independent groups, determining if at least one group mean differs significantly.

What does a p-value of 0.03 indicate in a food science experiment using a significance level of α = 0.05?

Answer: The result is statistically significant and the null hypothesis is rejected

Because p = 0.03 is less than α = 0.05, the result is statistically significant, meaning you reject the null hypothesis and conclude the tested variable had a real effect.

In a bench-to-pilot plant scale-up study, a research chef uses the same ingredient percentages but observes different texture outcomes. This discrepancy most likely reflects a failure in which research concept?

Answer: Scalability and process equivalence

Scalability and process equivalence ensure that unit operations (mixing, heating, cooling) translate proportionally from bench scale to pilot scale; differences in equipment dynamics often cause textural changes during scale-up.

Which document formally outlines the objectives, scope, methodology, and success criteria for a food product development project before experimentation begins?

Answer: Research protocol or project brief

A research protocol or project brief establishes the objectives, scope, methods, and success criteria upfront, ensuring all stakeholders align before costly experimentation starts.