Information Foraging

Information Foraging

Reviewed by Faisal Zaidi

Information foraging is the idea that looking for information works like looking for food. You follow a scent, judge how rich a source looks before committing to it, and leave when the returns thin out. Peter Pirolli and Stuart Card developed it at Xerox PARC and it became one of the standard frameworks in human-computer interaction. It is also the seed book's explanatory frame for self-interruption, imported from behavioural ecology, and Gazzaley and Rosen label that extension as their own proposal rather than a tested account.

What it is

The vocabulary is deliberate. Patches, scent, diet and the cost of travel are all lifted from the study of how animals feed, and the model asks when a forager should abandon a thinning patch for a richer one. Pirolli and Card introduced it in a 1995 conference paper and gave the full statement in Psychological Review in 1999. It is a modelling framework rather than a single effect, so asking whether it replicates is close to the wrong question. Applied to a mind at work rather than to a website, the proposal is that leaving a task before it is finished is patch-leaving behaviour.

In effect

It is why search results and headlines are written the way they are. What a reader judges in the first second is not the content but the scent, whether this link smells like it leads to the thing they want, and a page that buries its answer loses the forager before the answer arrives. Putting the takeaways at the top is information foraging made into a house rule. The same logic is what the seed book offers for why a person walks away from work that is going slowly.

What it does not say

It does not say self-interruption has been explained. The chapter that offers the account flags the extension repeatedly as something the authors propose and hypothesise, its figures are diagrams of that hypothesis rather than plots of data, and it closes by conceding that the foraging model was not formulated to account for the internal factors it is being asked to cover. It also does not say that information seeking is literally the food-foraging system repurposed, a claim the book itself notes rests largely on observations. Keep the framework, drop the origin story.

Sources

  1. Pirolli, P., and Card, S. (1999), 'Information foraging', Psychological Review 106(4), 643 to 675. First author Peter Pirolli, Xerox PARC. The full statement of the framework, after Pirolli and Card (1995), 'Information foraging in information access environments', Proceedings of CHI '95, 51 to 58. No doi recorded in our sources for either paper.
  2. Gazzaley, A. and Rosen, L. D., The Distracted Mind: Ancient Brains in a High-Tech World, The MIT Press, 2016. Chapter 1, p. 14, and chapter 9, pp. 160 to 165, where the framework is cited directly and then extended. The authors' own words throughout chapter 9 are 'we propose' and 'we hypothesize'.
  3. Thomas Hills is named and quoted in the book at p. 13 as a pioneer of the evolutionary version of this perspective. That is his published view, not a finding the book tests.