The Effect of Dietary Fiber on Food Liking

Participants will be randomized to one of three orders to reduce the possibility of an order
effect.The participants will be given a brownie specific for the condition they are in and
then will be instructed to eat the brownie in 10 minutes. Twenty minutes after consuming the
brownie participants will be served a lunch. Dependent variables will be food liking.

At the start of the session the participant will be asked to recall all foods and beverages
consumed 24 hours prior to the scheduled appointment. During this recall if a participant
reports consuming any foods or beverages besides water within 3 hours of the appointment, the
appointment will be rescheduled. Participants will also be asked if they have participated in
any physical activity 24 hours prior to their scheduled appointment. If the participant
answers "yes," then the appointment will be rescheduled.

After completing hunger and fullness VAS, participants will be presented with a preload of
brownie, β-glucan brownie, or psyllium brownie. The brownie will be prepared from the same
base recipe, thus be of the same approximate energy and macronutrient composition, but differ
in amount and type of dietary fiber. The base recipe will use a box of Pillsbury™ dark
chocolate brownie mix, two eggs, ¼ cup water and 2/3 cup of Food Club™ unsweetened
applesauce. The regular brownie will not contain any fiber, while the β-glucan and psyllium
brownie will contain about 6 grams of their respective fiber: Bulk Supplements™ β-glucan and
Frontier™ Psyllium Husk Powder. An additional tablespoon of water will be added to the
β-glucan brownie mix. The brownie will be presented warm, with two tablespoons of Cool Whip™
fat free spread on top, with 6 ounces of water. The participants will be told to consume all
of the brownie and toping, and to drink all of the 6 oz of water within 10 minutes. Next,
participants will rate their hunger and fullness again with the VAS and sit quietly for 20
minutes reading current magazines (i.e., People, Entertainment Weekly). After 20 minutes, the
participants will be presented with a sandwich (turkey or ham), chips, and grapes.The
sandwich will be cut into quarters on a plate, the chips and grapes will be presented in two
separate bowls. Following the presentation of the meal, participants will be instructed that
they will have 20 minutes to eat as much or as little as they would like of the meal provided
until satisfied, however they need to at least taste each of the foods. At the completion of
20 minutes, the lunch will be removed and the participant will be asked to complete a scale
for evaluating levels of hunger, fullness, and liking of the foods.

Inclusion Criteria:

- Body mass index (BMI) between 18.5 to 24.9 kg/m^2

- Unrestrained eater (<12 on Three Factor Eating Questionnaire [TFEQ])

- report liking turkey or ham sandwiches, brownies, grapes, and potato chips (rate all
items >50mm on a visual analogue scale [VAS]).

- Report regularly eating before 10 am

- Can completed all sessions within 6 weeks of the screening session.

Exclusion Criteria:

- Report binge eating

- Report a medical condition that influences eating

- Report food allergies to the study foods

- Currently smoke

- Report dietary restrictions

- Report not liking brownies

- Report currently taking a medication that effects appetite

- Report being pregnant or breast-feeding

- Report being an athlete in training.