The protocol and results tables are self explanatory for students. The results should provide them with a first hand experience of the active, exploratory nature of sense perception.

Students read the following instructions before undertaking the experiment.

While partner A’s back is turned, partner B collects the 5 shapes and selects 5 different plastic animals. Partner A, with back still turned away, puts out a hand. Partner B performs the following three tests with each shape or animal in turn.

  • Without moving the object at all, press it gently into Partner A’s fingertips and hold it still for a five second count.

  • Keeping the same orientation move the animal across the palm of partner A’s hand towards the fingertips slowly and gently five times.

  • Allow partner A to hold the plastic animal and move it around at will in the hand for a full five second count.

Partner A must try to guess the object at each stage . Don’t be too strict: a guess of “monkey” for a Lowland Gorilla is perfectly satisfactory. Record your results in the table below. Also record “Don’t know” and wrong guesses.

Pdf. of the protocol and full sized tables.

Our sense perceptions are already the result of this assimilation and equalization with regard to all the past in us...
— Friedrich Nietzsche: Will to Power. Aphorism 500


After working through the various sense perception class activities, especially the Yarbus eye-tracking experience, students will have discovered that, just as there are no naked perceptions, there can be no naked interpretations.

This unit explores our remarkable proclivity for speech recognition. It seems that built-in search mechanisms for points of interest and significance are as fundamental to language comprehension as they are to vision and touch.

If we know a language we scan the sounds we hear for linguistic points of interest and basic grammatical order. Speech comprehension in a familiar language seems instantaneous and is very forgiving. It has a gestalt quality.We fill in the gaps; ignore any hesitations, repetitions, silences or false starts. We forgive fragmented or otherwise eccentric grammar. We are able to decode variations in pronunciation and intonation. We infer the meaning of unfamiliar words by their context. We can presume the intended meaning of an incorrectly used word or an ambiguous word. We can navigate successfully
the polysemy of language.  

This activity requires access to laptops with internet access. Students will attempt an accurate, written transcription of just one minute of a decade old conversation between actress/singer Bette Midler and CEO of Disney, Michael Eisner. 

Working in pairs, students focus on the portion of the interview between 01:00 and 02:00. They will soon discover that even a single minute is a long time when making accurate transcriptions. They must record exactly what is being uttered including interruptions, mistakes, repetitions, false starts, hesitations and silences. They will need to use the pause and rewind buttons repeatedly. Students use BM: and ME: to differentiate between the two speakers.


Call on several pairs to perform the conversation based only on their transcriptions.

“What did you notice?” may be the only question necessary to begin a rich conversation about how we are able to navigate the messiness of everyday speech. The following questions may help steer the discussion and help students to stay on topic.

  • Explain the difference between the sounds being uttered and what is being understood by the listener?

  • How, if at all, is speech recognition like listening to music?

  • What is the cocktail party effect?

  • Why is it so difficult to program computers for speech recognition?

Animals are… informavores. And they get their epistemic hunger from the combination in exquisite organization, of the specific epistemic hungers of millions of microagents, organized into dozens or hundreds or thousands of subsystems. Each of these tiny agents can be conceived of as an utterly minimal intentional system, whose life project is to ask a single question, over and over and over ― “is my message coming in NOW?” “Is my message coming in NOW?” ― and springing into limited but appropriate action whenever the answer is YES. Without the epistemic hunger there is no perception, no uptake.
— Dennett, Daniel C. (1996) Kinds of Minds: Towards an Understanding of Consciousness. Basic Books of Harper Collins, New York.