Our partners at What Car? are researching how parents use their smart phones, tablets, laptops and PCs when they're buying a new car, and are inviting Mumsnetters to take part in their online study conducted by market research company GfK. You'll start by completing a short online questionnaire to see if you're eligible to take part in the full study, and everyone who completes the questionnaire will be put forward for a prize draw to win £100 of Amazon vouchers. Deadline for all applicants is Tuesday, 8 October 2013, and the winner of the Amazon vouchers will be contacted a week later. To complete the questionnaire, click on six.surveys.com/projects/UKC131001081C/addrandom.asp.