Australia only scored two penalties, both by Mile Jedinak, in their three games at the 2018 World Cup.

For years there has been an over-reliance on Tim Cahill to score goals.

Arnold believes the Socceroos have enough goal-scoring threats, but just need a more positive mind-set.

"A lot of it these days is about the mind and what the mind tells you, and the mental aspect of the game," the national team coach told Macquarie Sports Radio.

"I think that's the big improvement that you've seen in England.

"A lot of the top sides now use sports psychologists for the players - there's a lot of negativity in social media around players and what they read. It can affect people.

"I just think that there's a lot of talk that we don't score goals... I think we've got the players there, but then it's about the belief and backing yourself and giving yourself the opportunity to make a big impact."

Arnold also said he plans for the Socceroos to play a possession-based style of football under him.