Gregory said that getting advice from a professional worked, but was not the only route to confidence.
"Talking to family and friends, opening some books or using the internet, or resources from a financial provider, were just as good."
But it did find people who went though an adviser had a wider range of investments, including shares, bonds and managed funds.
Gregory said the biggest difference came from starting early.
"The investors feeling most confident are more likely to have looked for information or advice more than 10 years out from retirement.
"They are also more likely to have a healthy retirement savings balance. But there is still a lot of confidence, and significant final retirement balances, among investors who started between six and 10 years out from retirement," he said.
Gregory said none of the research findings was particularly surprising but taking the steps made a difference to people feeling confident and ending up with better financial resources in retirement.
How to wise up for retirement
• Choose the most suitable investments for you and your goals
• Know your finances and budget, so you can have confidence the money will last
• Check in with your investments, including getting expert help, to get further guidance
• Understand the investment risk, so you worry less about investments going up and down and also how it affects the amount of money you will have to live on.