Central Location Test (CLT) Solutions – SIS International
Central Location Testing

Product Tests and Sensory Evaluations in a Controlled Facility

SIS runs central location tests at our facility at 11 East 22nd Street in Manhattan’s Flatiron District. The space includes a test kitchen with temperature-controlled product storage, controlled lighting, HD video recording, and one-way mirror observation. Respondents handle, use, taste, or evaluate physical products under standardized conditions.

CLTs serve food and beverage brands, personal care companies, consumer electronics manufacturers, and CPG firms that need structured feedback from recruited respondents before committing to production or launch.

Central Location Test Facility - SIS International
What We Test

Six CLT Capabilities at Our NYC Facility

Each CLT starts with a screener questionnaire that defines who qualifies. SIS recruits from a national respondent database and through direct outreach for specialized audiences. Bilingual moderators on staff (Spanish, Mandarin, German).

Taste Tests and Flavor Evaluation

Respondents evaluate food and beverage products in our test kitchen under controlled temperature, lighting, and serving conditions. SIS uses sequential monadic designs (one product at a time in randomized order) to reduce comparison bias. Rating scales include 9-point hedonic scales for overall liking and JAR (Just About Right) scales for specific attributes like sweetness, texture, and saltiness. Triangle tests identify whether respondents can detect a formulation change.

Personal Care Sensory Testing

Respondents apply skincare, haircare, fragrance, and cosmetic products and provide structured feedback on texture, scent, absorption, residue, and perceived efficacy. SIS controls application method, product quantity, and environmental conditions to isolate sensory variables. Recent CLT work has included moisturizer texture comparison, shampoo fragrance ranking, and sunscreen application feel across multiple SPF formulations.

Product Prototype Handling

Consumers interact with physical prototypes of consumer electronics, household appliances, and packaged goods. SIS captures ergonomic feedback (grip, weight, balance), functional assessment (does it work as expected), and aesthetic reactions (materials, finish, color) through structured interview guides. Findings go directly into product gate reviews before tooling and production commitments.

Packaging and Shelf Simulation

SIS builds simulated shelf sets in the facility to test packaging visibility, findability, and preference against competitive products. Eye-tracking equipment measures where respondents look first, how long they dwell on each package, and which design elements drive pick-up. Research covers primary packaging, secondary packaging, shelf-ready displays, and label hierarchy for regulatory compliance (FDA nutrition facts, EU allergen declarations).

Monadic and Paired Comparison Designs

SIS designs CLTs using the test structure that matches the research question. Sequential monadic testing evaluates each product independently. Paired comparison forces a choice between two options. Protomonadic designs combine both: independent evaluation followed by direct comparison. Sample sizes are calculated to achieve statistical significance at the confidence level the client’s decision requires, typically 100 to 300 respondents per cell.

High-Volume Recruitment and Throughput

The Flatiron District facility runs multiple sessions per day. SIS recruits respondents by demographics, purchase behavior, category usage, and brand awareness through our national database. For specialized audiences (physicians evaluating medical devices, engineers assessing industrial components, sommeliers evaluating wine), SIS recruits through direct professional outreach. Typical CLT projects field 150 to 500 respondents over one to two weeks.

SIS International – Central Location Tests (CLT)
HOW SIS RUNS CENTRAL LOCATION TESTS

Three CLT Engagement Types at Our NYC Facility

Each test is conducted under controlled conditions at 11 East 22nd Street in Manhattan’s Flatiron District. SIS controls lighting, temperature, serving method, and product presentation to isolate the variable being measured. Typically 150 to 500 respondents per project.

CLT TYPE 01 // FOOD & BEVERAGE
TASTE TESTS AND SENSORY PROFILING
Evaluate Recipes, Formulations, and Flavor Variants
SIS runs blind and branded taste tests in our test kitchen with temperature-controlled product storage and standardized serving protocols. Sequential monadic designs present one product at a time in randomized order to reduce comparison bias. Rating instruments include 9-point hedonic scales for overall liking, JAR (Just About Right) scales for specific attributes (sweetness, saltiness, texture, carbonation), and triangle tests that determine whether respondents can detect a formulation change. Recent CLT work: sparkling water flavor comparison, snack brand reformulation validation, plant-based protein texture assessment.
CLT TYPE 02 // PERSONAL CARE & CPG
PRODUCT HANDLING AND SENSORY EVALUATION
Test Texture, Fragrance, and Application Before Production
Respondents apply, handle, or use physical products under controlled conditions. SIS standardizes application quantity, method, and environmental factors (humidity, lighting) to isolate sensory variables. Research captures fragrance preference, texture perception, absorption rate, residue assessment, and perceived efficacy. For packaging CLTs, respondents evaluate open-and-close mechanics, dispense control, and label readability. Recent work: moisturizer texture comparison across three formulations, shampoo fragrance ranking, sunscreen application feel by SPF level.
CLT TYPE 03 // PROTOTYPE & CONCEPT
DESIGN VALIDATION AND SHELF SIMULATION
Validate Physical Products and Packaging Before Tooling
SIS builds simulated shelf sets in the facility to test packaging visibility, findability, and preference against competitive products. Eye-tracking measures first fixation, dwell time, and pick-up rate. For product prototypes (electronics, appliances, household goods), respondents evaluate ergonomics, materials, and functionality through structured interview guides. Pricing validation uses Van Westendorp or Gabor-Granger methods calibrated to the competitive set. The output feeds directly into product gate reviews before tooling investment.
WHAT YOU RECEIVE

CLT Findings Ready for Decision-Making

Every CLT produces structured data that a product team, R&D director, or brand manager can bring directly into a go/no-go meeting. SIS handles screener development, recruitment, test design, moderation, data collection, and analysis as a single engagement.

01
Preference Scores with Statistical Significance

Hedonic ratings, JAR attribute scores, and paired comparison results calculated at the confidence level the decision requires (typically 90% or 95%). Sample sizes are designed to detect meaningful differences between variants, not just generate a directional signal. The report identifies the winning formulation, variant, or design with supporting evidence.

02
Formulation and Design Optimization Data

JAR diagnostics pinpoint where specific attributes need adjustment: too sweet, not crunchy enough, fragrance too strong. Penalty analysis quantifies how much each off-target attribute reduces overall liking. R&D teams use this to prioritize reformulation work by impact rather than by internal opinion.

03
Packaging Performance Against Competitive Shelf Sets

Eye-tracking metrics (time to first fixation, total dwell time, pick-up rate) measured in a simulated retail environment with real competitive products on the shelf. Findings show whether the packaging gets noticed, gets picked up, and gets chosen. Tested under conditions that replicate the actual purchase context, not a sterile evaluation.

04
Pricing Validation Calibrated to the Category

Van Westendorp price sensitivity analysis or Gabor-Granger demand curves built from responses by category buyers recruited through SIS screeners. The output identifies optimal price point, acceptable price range, and the price ceiling where purchase intent drops. Tested against the specific competitive set the product will face on shelf, not in isolation.


Recommended

Central Location Tests vs Focus Groups

Central Location Tests vs Focus Groups

Central Location Tests vs Focus Groups Central Location Tests are …
CLT Market Research

CLT Market Research

CLT market research gives insights into purchaser behaviors toward product …
Top Central Location Testing Company

Top Central Location Testing Company

Top Central Location Testing Company Central location testing (CLT) is …

Expand globally with confidence. Contact SIS International today!