Patent ID: 7389777

Claim:
A method of determining a change of a physiological characteristic in a human subject in response to a stimulus comprising the steps: (a) assessing a first physiological characteristic of the human subject; (b) administering the stimulus to the human subject; wherein the stimulus comprises the human subject using a product in a task; wherein the product comprises a beauty care product, hair care product, personal cleansing product, home care product, baby care product, feminine care product, over-the-counter product, or a combination thereof; wherein the task comprises the human subject using the product for the product's intended use; (c) assessing a second physiological characteristic of the human subject; (d) comparing the first physiological characteristic and the second physiological characteristic to determine the change of the physiological characteristic in the human subject in response to the stimulus; and wherein the physiological characteristic comprises a heart rate, pulse transit time, peripheral blood flow, standard deviation of normal to normal beats (SDNN), skin temperature, skin conductivity, pupil dilation, salivary flow, capillary dilation, bronchi constriction, stomach motility, or combination thereof.