Kate V. Morgan

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Contrary to theories of rational choice, adding alternatives to a choice set can change the choices made by both humans and animals. This is usually done by adding an inferior decoy to a choice set of two favoured options that are characterized on two distinct dimensions. We presented wild, free-living rufous hummingbirds (Selasphorus rufus) with choices(More)
As a social species zebra finches might be expected to copy the food choices of more experienced conspecifics. This prediction has been tested previously by presenting observers with two demonstrator birds that differ in some way (e.g., sex, familiarity), each feeding on a different colour food source. However, if the observer subsequently exhibits a(More)
Katja Mehlhorn and Cleotilde Gonzalez were supported by the National Science Foundation Award number: 1154012 to Cleotilde Gonzalez. The ideas in this manuscript originated from discussions in a workshop titled: "Predicting Choice from Exploration" Abstract Many decisions in the lives of animals and humans require a fine balance between the exploration of(More)
We examine the impact of chewing gum on a Bakan-type vigilance task that requires the continual updating of short-term order memory. Forty participants completed a 30-min auditory Bakan-task either with, or without, the requirement to chew gum. Self-rated measures of mood were taken both pre- and post-task. As expected, the vigilance task produced a(More)
It is generally assumed that birds' choice of structurally suitable materials for nest building is genetically predetermined. Here, we tested that assumption by investigating whether experience affected male zebra finches' (Taeniopygia guttata) choice of nest material. After a short period of building with relatively flexible string, birds preferred to(More)
Worksystems, Inc. is a nonprofit workforce intermediary serving the City of Portland, Washington and Multnomah counties. The mission of the organization is to build a comprehensive workforce development system that supports individual and business competitiveness. The organizational values essential to the growth and vitality of the system include: A(More)
For both humans and animals preference for one option over others can be influenced by the context in which the options occur. In animals, changes in preference could be due to comparative decision-making or to changes in the energy state of the animal when making decisions. We investigated which of these possibilities better explained the response of wild(More)
In nature, many animals build structures that can be readily measured at the scale of their gross morphology (e.g. length, volume and weight). Capturing individuality as can be done with the structures designed and built by human architects or artists, however, is more challenging. Here, we tested whether computer-aided image texture classification(More)
When making decisions between options, humans are expected to choose the option that returns the highest benefit. In practice, however, adding inferior alternatives to the choice set can alter these decisions. Here we investigated whether decisions over the facial features that people find healthy looking can also be affected by the context in which they(More)
When animals make choices about food sources, potential mates or nest sites, they encounter options either simultaneously or sequentially. As human choices can be altered depending on whether they encounter options simultaneously or sequentially, it seems plausible that animal choices may also be influenced by the way in which they encounter options. Here,(More)