science

Sensory-specific satiety

Sensory-specific satiety is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Sensory-specific satiety rather than just read about it. In short: Sensory specific satiety is a phenomenon that refers to the declining satisfaction generated by the consumption of a certain type of food, and the consequent renewal in appetite resulting from the exposure to a new flavour or food. The energy density and nutrient composition of foods has little effect on sensory-specific satiety.

Key takeaways

Sensory-specific satiety belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Sensory-specific satiety to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sensory-specific satiety from memory before moving on to harder problems.

Reference excerpt

Sensory specific satiety is a phenomenon that refers to the declining satisfaction generated by the consumption of a certain type of food, and the consequent renewal in appetite resulting from the exposure to a new flavour or food. The energy density and nutrient composition of foods has little effect on sensory-specific satiety. The sensory hedonic phenomenon was first described in 1956 by the French physiologist Jacques Le Magnen. The term "sensory specific satiety" was coined in 1981 by Barbara J. Rolls and Edmund T. Rolls. The concept illustrates the role of physical stimuli in generating appetite and, more specifically, explains the significance of taste, or food flavour in relation to hunger. Besides conditioned satiety and alimentary alliesthesia, it is one of the three major phenomena of satiation. An Ingestive Classics paper on the topic has been written in conversation with Barbara J. Rolls.

Studies on sensory-specific satiety Sensory specific satiety is most commonly illustrated in the laboratory setting by offering participants a first course, as much as the participant desires. Then after a short interval offering a second course or access to a standard buffet. After eating a first course consisting of one food, participants are less likely to select that food again if offered the same food in a second course, or to select this food again from an array presented in a buffet. The more variety offered, the more people will eat. Thus, a larger amount of food will be eaten at a buffet because the variety of foods and flavors presented renews the desire to eat (appetite) in the individual. A study conducted by Rolls and van Duijvenvoorde in 1984 verified this process by simulating a buffet-style meal. They fed participants four courses of the same food or four courses of different foods which included sausages, bread and butter, chocolate dessert, and bananas. The results revealed a 44% increase in overall food consumption when exposed to the meals with a variety of foods. Postingestive feedback factors such as energy density and nutrient composition was theorized to affect the palatability of a food, which in turn would inhibit or facilitate sensory specific satiety. However, studies done by Birch & Deysher (1986) and B.J. Rolls et al., summarized in a paper by Raynor and Epstein, show that postingesitive feedback does not influence sensory specific satiety. Since postingestive feedback seems to have little effect on the expression of sensory specific satiety, it is probable that sensory specific satiety is more driven by external factors, such as the sensory properties of the food, than internal factors. In other words, the study suggested that energy density and nutrient composition of foods has little effect on sensory-specific satiety.

Obesity in relation to sensory specific satiety Studies have shown that eating a limited variety of foods can result in monotony effects, which some have termed "long-term sensory-specific satiety". By continuing to eat similar meals, a dieter can reduce their overall food intake and use sensory specific satiety as a tool for weight loss. In contrast, eating a large variety of foods is thought to be a driver of overconsumption with potential links to obesity because of the stimulation of appetite from diverse foods. Foods which are high in energy density do not produce a greater level of sensory specific satiety than foods which are low in energy density.

Age in relation to sensory specific satiety Sensory specific satiety varies depending on age, with older adults experiencing decreased sensory specific satiety and adolescents experiencing enhanced effects. In a study focusing on age in sensory specific satiety, it was hypothesized that the degree of sensory specific satiety is affected by age due to the slow sensory loss experienced by people as they age. It was predicted that due to sensory impairment with ageing, older people might tend towards consuming a monotonous diet since foods are experienced as less pleasantness resulting from blunted sensory acuity. However, it was shown that the decline in sensory specific satiety observed in ageing was not linked to sensory loss; instead, there is an unclear cognitive process that relates to decline in sensory specific satiety that may reflect an overall desire in appetite with ageing compared to adolescents.

Illustrations

Worked examples

Example 1 — a first encounter with Sensory-specific satiety

Start with the simplest possible case. Write down what Sensory-specific satiety claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Sensory-specific satiety before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Sensory-specific satiety ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Sensory-specific satiety

In research: Sensory-specific satiety appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Sensory-specific satiety in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Sensory-specific satiety is common in secondary-school and first-year university syllabi. It links to neighbouring topics Human nutrition, Sensory systems, so understanding it makes those chapters shorter.
In everyday life: Look for Sensory-specific satiety outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Sensory-specific satiety in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sensory-specific satiety means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Sensory-specific satiety out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sensory-specific satiety in simple terms?

Why does Sensory-specific satiety matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Sensory-specific satiety?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Sensory-specific satiety.