3,680 rated or chosen profiles from 184 respondents, in up to 10 tasks of 2 profiles varying on 5 attributes.

About this table

Description	184 Dutch-speaking respondents chose between two decorative firefly-light products (number of lights, light effect, panel visibility, installation, price) or neither, in 10 fixed paired tasks that every respondent saw. One choice outcome with an explicit neither option.
Reference	Deschepper, T. (2026). Conjoint Survey Results Akaro Fireflies With Non Chosen Options [Data set]. Zenodo.
Licence	CC BY 4.0
Source data	https://doi.org/10.5281/zenodo.20754003

Notes

Conjoint table (irw_conjoint_2). Paired choice between two firefly-light products described by five attributes (Dutch text), with a 'neither' option (opt-out; both profiles 0 in 475 of 1,840 tasks); the question wording is not in the deposit. Fixed design: all 184 respondents saw the same 10 pairs in the same order. The installation level is missing from most chosen-answer texts in the source and was filled from the fixed design, so that respondents saw it is inferred.

These notes describe the source data, which the IRW reproduces as released. All notes are listed on the Data Notes page.

Size and shape

Respondents	184
Rows (one per respondent, task and profile)	3,680
Tasks per respondent (most)	10
Profiles per task	2
Attributes	5
Tasks with no profile chosen	475

Design

Topic	consumer products
A profile represents	product service
Country	NL
Language shown	nl
Language of stored levels	nl
Randomization restrictions	unknown
Task order	inferred from row order
Profile position	recorded in the deposit

Task order or profile position was rebuilt from row order; analyses of position or task order should leave it out.

Outcomes:

choice	unknown (survey wording not in the deposit); pick Optie A, Optie B or Geen van beide [choice, opt-out allowed]

Columns

attr_effectattr_installationattr_lightsattr_panelattr_pricechoicecov_age_groupcov_gendercov_housingcov_purchase_likelihoodcov_use_placecov_value_atmospherecov_value_easecov_value_sustainabilityidprofiletask

The layout (one row per respondent, task and profile; choice/rating outcomes; attr_ columns holding each attribute level as displayed) is defined in the IRW conjoint standard. What the outcomes asked is under Design above.

Get the data

Download CSVno account needed Browse on Redivisexplore and query Croissant metadataHugging Face, Kaggle, OpenML

Or load it directly in R or Python (both need a free Redivis account; the first call opens a browser to sign in):

# R
install.packages("remotes")
remotes::install_github("itemresponsewarehouse/Rpkg")
library(irw)
df <- irw_fetch("deschepper_2026_firefly_lights", source = "conj")

# Python
pip install irw

import irw
df = irw.fetch("deschepper_2026_firefly_lights", source="conj")

How to cite

@misc{https://doi.org/10.5281/zenodo.20754003,
  doi = {10.5281/ZENODO.20754003},
  url = {https://zenodo.org/doi/10.5281/zenodo.20754003},
  author = {Deschepper, Tom},
  title = {Conjoint Survey Results Akaro Fireflies With Non Chosen Options},
  publisher = {Zenodo},
  year = {2026},
  copyright = {Creative Commons Attribution 4.0 International}
}

Version and provenance

IRW version	v584
Redivis dataset	irw_conjoint_2 v1.4
Redivis dataset DOI	10.57761/hk97-wv30
Manifest pin for this IRW version	v1.4
Metadata source	irw_meta v44.0