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The psychology of slot symbols: how iconography influences player behaviour

Imagery has always been a central part of the slot gaming experience. Even manufacturers of the most primitive one-armed bandits knew the power that could potentially be harnessed by employing psychology to attract players and keep them playing.
It remains no less true today that, through imagery, operators and developers know exactly how to push our buttons.
Nostalgia and imagery
Amongst the most potent of human emotions is nostalgia, a wistful yearning for a previous time, whether we lived through it or not.
Classic slot symbols, such as 7s, bars, bells and fruit, are all used to elicit a feeling of nostalgia for the time of traditional, physical machines in brick-and-mortar casinos. This has the effect of making us feel like we’re engaging with something wholesome and familiar, and this familiarity in turn serves to reassure us that whatever we’re doing is okay.
By evoking memories of a simpler time, whether on a conscious or subconscious level, and whether the player actually experienced those times or not, a zone of psychological comfort and safety can be created for the player.
Wealth
Slot players are often dreaming of those big, life-changing wins, and the iconography of slot machines feeds on this, providing reassurance that one’s big win is always just around the corner.
By employing images which suggest wealth, such as coins, dollar symbols and stacks of cash, slot machines continuously remind us that there’s real money on the table, and that this particular game offers a potential path to riches.
The power of colour
Colour psychology is a scientific field in its own right, and slot machines have been utilising the wealth of research on this topic since their conception.
The overall brightness of slot machines stimulates the player’s brain, keeping them engaged, whilst specific colours are used to create a unique ambience, giving each game an identity related to its colour palette.
Certain colours can evoke certain emotions, and there are many colour-related patterns which can be seen across modern slot machines. For instance, greens are often used in the design of slot machines, to elicit a sense of nature and freshness. Similarly, golds are used to suggest wealth and prosperity.
Familiar themes
The iconography of recurring themes is another way that designers can create specific associations with their games in the minds of their players.
Popular themes include ancient Egypt (Cleopatra, Magic of the Nile), the luck of the Irish (Rainbow Riches, Pot o’ Gold), and many more. Recently, there’s been an upsurge in the number of games based on fishing themes (Big Bass Bonanza, Golden Catch).
Familiar symbolism also comes in the form of existing intellectual properties, such as TV shows (Deal or No Deal, Game of Thrones), musical groups (Guns N’ Roses, Kiss), and popular movies (Rocky, Beetlejuice, The Godfather).
These slot games may be licensed, or they may simply refer to these IPs in an unofficial capacity. Either way, players enjoy the familiarity they offer, as well as the chance to engage with references to their favourite media.
Some games even allow operators to become the theme, customising the game as they see fit. For example, Fluffy Favourites can be adapted to reflect the theme of an operator’s website, reinforcing brand loyalty within the game.
The psychology of winning
It’s the idea of a win that keeps players playing, and slot machine designers use this fact, along with established psychological theories and phenomena, to make their games gripping.
For instance, cognitive biases are thought processes which are often observed, according to which the human brain tends to follow certain heuristic paths, simplifying information and passing it through a system of mental filters.
In terms of slot machine design, this means that, for example, a player who comes close to hitting a high-value combination of symbols is likely to interpret this as almost winning, which has the effect of making them more likely to spin again.
The psychological concept of conditioning can also be applied to slot machine design. Winning combos are often accompanied by celebratory sound effects and animations, including raining coins and victorious trumpets, creating positive associations in the minds of players, and encouraging them to seek this reward out again.
Psychology and ethics in gambling
There are, of course, moral and ethical implications of applying psychology to gambling. At what point does it become coercive? When is suggestion actually manipulation? The burden of answering these questions and monitoring appropriate slot machine design falls on the Gambling Commission.
The Commission have already implemented several rules which seek to minimise problem gambling and the development of bad habits, such as banning auto-play functions, limiting the time between spins, and ensuring that players have access to safer gambling tools.
However, it may be the case that more could be done to educate players on the psychological effects of symbolism in their favourite games.
Beating the system
Being aware of the psychological methods used by operators to keep a person playing is the first step in ensuring that one isn’t being manipulated.
Making good use of bonuses and promotions is a good way to enjoy better value gaming, and setting strict limits will help to ensure that players only spend what they can afford to lose.
Online casino free spins are a great way to try out slot games without risking real money. Customers can get free spin offers from no-deposit sign-up bonuses, or use the available demo versions to try games out for free.
Because many psychological methods operate on an unconscious level, and therefore cannot necessarily be noticed, good responsible gambling practices are a must if we are to ensure that gambling takes place in a healthy environment, and that players are not being taken advantage of.
Latest News
BMM INNOVATION GROUP TO SHOWCASE ITS WORLD-LEADING TESTING SERVICES FOR BRAZIL’S FAST-GROWING GAMING MARKET AT BIS SIGMA AMERICAS SUMMIT APRIL 7–10

Company to share expert insights and highlight its fast-track product certification and lottery support at São Paulo, Brazil show
BMM Innovation Group (“BMM,” “BIG Group,” or “BIG”), a technology conglomerate focused on product compliance testing, cybersecurity solutions, and virtual training for the global gaming industry, will exhibit at BiS SiGMA Americas April 7-10 at the Transamerica Expo Center in São Paulo, Brazil in Stand No. F133.
As Brazil’s gaming landscape undergoes a significant transformation under new federal regulations, BMM is heavily partnered with operators, suppliers, and regulators through this transition. With its three expert divisions – BMM Testlabs, BIG Cyber, and RG24seven Virtual Training – the BIG Group brings unmatched expertise in product testing, cybersecurity, and responsible gaming education, all vital for success in the dynamic Brazilian market.
At the show, BMM will highlight its fast-track product testing and certification process, developed specifically to address Brazil’s recertification requirements for B2B and B2C operators. This streamlined service ensures that gaming companies meet all regulatory standards while maintaining their operating licenses with minimal disruption.
BMM Testlabs’ Marzia Turrini, President of iGaming & Cybersecurity, said, “BMM is committed to guiding customers through the certification process with speed, precision, and expert support. Our goal is to reduce regulatory risks and accelerate time to market in Brazil’s evolving regulatory environment.”
At BiS SiGMA, BMM will highlight its support for Brazil’s expanding state lottery market, working closely with operators to support multi-jurisdictional entry and growth. BMM’s lottery and iLottery testing services help ensure full compliance while enabling faster, broader market access.
Visitors to BMM Innovation Group’s stand at BiS SiGMA Americas will gain insights into the Company’s full suite of services for cybersecurity and defense, as well as responsible gaming, including:
- Vulnerability assessments, penetration tests, PCI:DSS evaluations, and a suite of managed security services featuring CYREBRO’s Security Operations Center, KnowBe4’s security awareness training, and Maxxsure’s risk management platform.
- RG24seven Virtual Training, offering expert-led education on responsible gaming, anti-money laundering, and many other important topics, available in Portuguese, Spanish, and English for gaming professionals worldwide.
Turrini added, “BMM is more than just a test lab. We are a long-term strategic partner, helping shape a secure, responsible, and compliant gaming industry in Brazil and globally.”
BMM invites all BiS SiGMA attendees to stop by Stand No. F133 and discover how the Company drives innovation, reliability, and trust across Brazil’s regulated gaming industry. For more information on BMM’s Brazil support, visit the BMM Brazil Hub at brazil.bmm.com/.
The post BMM INNOVATION GROUP TO SHOWCASE ITS WORLD-LEADING TESTING SERVICES FOR BRAZIL’S FAST-GROWING GAMING MARKET AT BIS SIGMA AMERICAS SUMMIT APRIL 7–10 appeared first on Gaming and Gambling Industry in the Americas.
Latest News
Bacta’s George McGregor to step down

George McGregor, Bacta’s Executive Director – Government Relations, has announced that he is moving on from the UK trade association at the end of June.
His departure following the Bacta AGM marks the conclusion of a 21-year association with the trade body.
He was an external adviser to Bacta in his role as Managing Director of the public affairs consultancy Interel (now DGA) and has served as Bacta Executive Director since January 2024.
George McGregor, confirmed: “In August this year I turn 60 and my intention is to shift gear in my career, moving from a full-on role to project and advisory work.
“I am incredibly proud of my work with Bacta over the years in helping it achieve tangible benefits for members.
“Between now and my departure there is still a lot to do. We need to finalise our response to the Gambling Minister on stakes and prizes, conclude our submission to the Gambling Commission’s review of gaming machine technical standards and push hard to see the delivery of the long overdue Gambling White Paper reforms”.
John Bollom, Bacta President, added: “We are very sad to see George moving-on but we understand his reasons and wish him well in the future. George is smart, determined and personable. He will leave big boots to fill.”
The post Bacta’s George McGregor to step down appeared first on European Gaming Industry News.
Africa
Play’n GO announces landmark South African partnership with Hollywoodbets

Play’n GO, the world’s leading casino entertainment provider, has today announced a new operator partnership in South Africa with Hollywoodbets.
The legendary games studio went live in South Africa in 2024, and this newly announced partnership will see classic Play’n GO titles such as Fire Joker, Rise of Olympus 100 and Boat Bonanza now available to Hollywoodbets players in South Africa.
Play’n GO enjoyed a landmark year in 2024, expanding its reach globally, and recently announced the launch of two brand new slots mechanics, Blitzways™ and Crashback™.
Stuart Trigwell, Director of Business Development at Play’n GO, commented “South Africa is a market of increasing significance in iGaming globally, and we’re very pleased to have gained such a strong foothold in the country with this partnership.
“The Hollywoodbets brand is synonymous with iGaming in South Africa, and this partnership reflects the commitment of both Play’n GO and Hollywoodbets to deliver the best casino gaming experience possible to players in the region. We’re excited for the opportunities that will come from this partnership, and we look forward to many years of success together.”
Wayde Dorkin, Head of Product at Hollywoodbets added “We’re looking forward to welcoming Play’n GO’s legendary games portfolio to our platform, and we know our players are just as excited as we are. We’re committed to being the number one operator in South Africa, and partnering with Play’n GO is a significant step forward on that journey.”
The post Play’n GO announces landmark South African partnership with Hollywoodbets appeared first on European Gaming Industry News.
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